The inline-six engine has long been revered by automotive enthusiasts for its inherent smoothness, exceptional balance, and impressive power delivery.
Unlike V6 engines, inline-six configurations feature all six cylinders arranged in a straight line, creating a naturally balanced design that minimizes vibrations and delivers power with remarkable refinement.
This classic engine layout, which powered legendary vehicles for decades, experienced a decline in popularity as automakers shifted toward more compact V6 and turbocharged four-cylinder engines. However, recent years have witnessed a remarkable renaissance of the inline-six, particularly in the SUV segment.
Modern inline-six engines combine the traditional virtues of smoothness and durability with cutting-edge technology including turbocharging, mild-hybrid systems, and advanced fuel management.
These powerplants deliver impressive performance figures while maintaining respectable fuel economy, making them ideal for today’s SUVs that must balance capability with efficiency.
The longer engine bay required for an inline-six configuration naturally suits larger SUVs, where packaging constraints are less restrictive than in compact vehicles.
For buyers seeking SUVs that offer serious value, inline-six power represents an attractive proposition. These vehicles typically deliver premium performance, refinement, and long-term reliability without the astronomical price tags associated with V8-powered alternatives.
Whether you prioritize silky-smooth highway cruising, robust towing capability, or simply the satisfaction of driving a vehicle with one of automotive engineering’s most elegant engine configurations, the following ten inline-six SUVs represent outstanding value in today’s market.
From luxury offerings that undercut their V8 competitors to surprisingly affordable mainstream options, these vehicles prove that inline-six power remains highly relevant in the modern automotive world.
1. BMW X5 xDrive40i
The BMW X5 has long been considered the benchmark for luxury performance SUVs, and the xDrive40i variant equipped with BMW’s silky-smooth turbocharged 3.0-liter inline-six engine represents exceptional value in the premium SUV segment.
This powerplant produces 375 horsepower and 398 lb-ft of torque, delivering effortless acceleration that propels the substantial SUV from zero to sixty in just 5.3 seconds. The engine’s refinement is truly remarkable, with virtually no vibration transmitted to the cabin even under hard acceleration, exemplifying everything that makes inline-six engines special.
BMW’s inline-six features advanced technology including a twin-scroll turbocharger and variable valve timing, ensuring strong performance across the entire rev range.
The engine works in perfect harmony with the standard eight-speed automatic transmission, which shifts with precision whether you’re cruising on the highway or attacking a winding mountain road.
The xDrive all-wheel-drive system distributes power intelligently between all four wheels, providing confident traction in various conditions while maintaining BMW’s characteristic rear-wheel-drive bias for engaging dynamics.
What makes the X5 xDrive40i such tremendous value is its positioning within BMW’s lineup. While it costs significantly less than the V8-powered X5 M50i, the inline-six model sacrifices remarkably little in terms of performance or refinement.
For most drivers, the 375-horsepower output provides more than adequate power for any real-world situation, from merging onto highways to towing boats or trailers. The fuel economy advantage over the V8 is also noteworthy, with EPA estimates of 21 mpg city and 26 mpg highway representing respectable efficiency for such a capable luxury SUV.
Compared to competitors like the Mercedes-Benz GLE 450 or Audi Q7, the X5 xDrive40i offers superior driving dynamics while matching or exceeding their refinement levels.
The inline-six engine’s soundtrack is particularly appealing, producing a refined growl under acceleration that reminds you of the sophisticated engineering under the hood. For buyers seeking a luxury SUV that delivers premium performance without V8 pricing, the X5 xDrive40i represents one of the best values available today.
2. Mercedes-Benz GLE 450 4MATIC
Mercedes-Benz’s GLE 450 4MATIC showcases the German automaker’s latest inline-six technology, featuring a 3.0-liter turbocharged engine enhanced with EQ Boost mild-hybrid technology.
This sophisticated powerplant produces 362 horsepower and 369 lb-ft of torque from the combustion engine alone, with the integrated starter-generator adding an additional 21 horsepower and 184 lb-ft of torque for brief periods during acceleration.
This electrified inline-six configuration represents the future of internal combustion engines, combining traditional refinement with modern efficiency.
The EQ Boost system serves multiple functions beyond simply adding power. It enables smooth engine starts and stops, recovers energy during deceleration, and provides instant torque fill to eliminate turbo lag.
The result is an SUV that feels exceptionally responsive from any speed, with seamless power delivery that makes the GLE 450 feel quicker than its 5.7-second zero-to-sixty time might suggest.
The nine-speed automatic transmission shifts imperceptibly, contributing to the sense of refinement that Mercedes-Benz customers expect.
Where the GLE 450 truly excels is in its combination of luxury and technology. The interior represents one of the finest cabins in the segment, featuring Mercedes’ stunning MBUX infotainment system with dual high-resolution displays, ambient lighting with 64 color options, and available massaging front seats with heating, cooling, and multiple adjustment options.
The attention to detail is exceptional, from the satisfying weight of the switchgear to the aromatic fragrance system that subtly enhances the cabin environment.
The value proposition of the GLE 450 becomes clear when comparing it to the more expensive GLE 53 AMG. While the AMG variant offers additional performance, the 450 provides similar levels of luxury and technology at a significantly lower price point.
The inline-six engine delivers ample power for confident highway passing, spirited driving on backroads, and towing capabilities up to 7,700 pounds when properly equipped. Fuel economy figures of 20 mpg city and 26 mpg highway are impressive given the vehicle’s size and performance capabilities.
Mercedes-Benz’s 4MATIC all-wheel-drive system provides excellent traction in various conditions, while the available Airmatic air suspension delivers a magic carpet ride quality over rough pavement.
The adaptive damping system can be adjusted through multiple drive modes, allowing drivers to prioritize comfort for daily commuting or tighten things up for more spirited driving.
Advanced safety features including Active Distance Assist, Active Steering Assist, and Evasive Steering Assist provide cutting-edge driver assistance that enhances both safety and convenience during long journeys.
3. BMW X7 xDrive40i
The BMW X7 xDrive40i brings inline-six refinement to the three-row luxury SUV segment, offering families serious value in a package that exudes presence and capability.
Powered by the same excellent turbocharged 3.0-liter inline-six found in the X5, producing 375 horsepower and 398 lb-ft of torque, the X7 proves that you don’t need a V8 to move a full-size luxury SUV with authority.
Despite its substantial size and weight, the X7 accelerates from zero to sixty in just 5.8 seconds, delivering performance that feels effortless regardless of how many passengers are aboard.
What sets the X7 apart in the value equation is its positioning as BMW’s flagship SUV. This vehicle offers commanding road presence with its massive kidney grille, imposing stance, and substantial dimensions that rival traditional American full-size SUVs.
Yet instead of requiring a thirsty V8, the inline-six provides sufficient power while returning respectable fuel economy figures of 20 mpg city and 25 mpg highway. For families prioritizing efficiency without sacrificing performance, this represents significant long-term savings compared to V8-powered competitors.
The X7’s interior is truly spectacular, offering genuine luxury for six or seven passengers across three rows. The second-row captain’s chairs in six-passenger configuration provide executive-level comfort with heating, ventilation, and power adjustment.
Even the third row offers adult-accommodating space, a rarity in the segment where most competitors relegate the rearmost seats to children only. Premium materials abound throughout the cabin, including extended leather upholstery, open-pore wood trim, and metal accents that create an ambiance befitting BMW’s flagship.
The inline-six engine’s refinement becomes particularly appreciated during long family road trips. The engine operates with minimal noise and vibration at highway speeds, contributing to a serene cabin environment.
When power is needed for passing or merging, the turbo-six delivers immediate response without the dramatics of a larger engine. The eight-speed automatic transmission shifts smoothly and intelligently, rarely requiring manual intervention even during spirited driving.
Compared to rivals like the Mercedes-Benz GLS 450 or Audi Q7, the X7 xDrive40i offers superior driving dynamics while matching their luxury credentials. BMW’s commitment to driver engagement remains evident even in this large SUV, with precise steering and well-controlled body motions that belie its size.
Advanced features including gesture control, wireless Apple CarPlay, a panoramic sky lounge LED roof, and available rear-seat entertainment systems ensure that all passengers remain comfortable and entertained. For families seeking three-row luxury without V8 fuel consumption, the X7 xDrive40i delivers exceptional value.
4. Genesis GV80 3.5T
The Genesis GV80 3.5T represents outstanding value in the luxury SUV segment, offering inline-six refinement and performance at prices significantly below established German competitors.
Genesis equips the GV80 with a twin-turbocharged 3.5-liter inline-six producing 375 horsepower and 391 lb-ft of torque, matching or exceeding the output of more expensive rivals while undercutting them substantially in price.
This impressive powerplant accelerates the substantial SUV from zero to sixty in approximately 5.5 seconds, delivering exhilarating performance that contradicts the Genesis brand’s reputation for prioritizing comfort over sportiness.
The value proposition extends far beyond competitive pricing. Genesis includes an extraordinary array of standard features that competitors charge thousands extra to provide.
Every GV80 3.5T includes a head-up display, ventilated Nappa leather seats, a 14.5-inch touchscreen infotainment system, wireless device charging, highway driving assist, and a premium audio system.
The attention to detail rivals or exceeds vehicles costing $20,000 more, with exquisite interior materials including genuine wood trim, metal accents, and quilted leather surfaces creating an exceptionally luxurious environment.
The inline-six engine in the GV80 operates with remarkable smoothness, delivering power with a refined character that suits the vehicle’s upscale positioning perfectly. Genesis engineers have clearly prioritized refinement, as the engine remains whisper-quiet during normal driving yet produces a pleasing growl when pushed harder.
The eight-speed automatic transmission shifts seamlessly, and the available all-wheel-drive system provides confident traction without any noticeable compromise to efficiency. Fuel economy figures of 18 mpg city and 24 mpg highway are reasonable for a vehicle of this size and capability.
Beyond performance and luxury, Genesis sweetens the deal with industry-leading warranty coverage including a five-year/60,000-mile basic warranty and a ten-year/100,000-mile powertrain warranty.
This comprehensive coverage provides peace of mind that luxury competitors simply cannot match. Additionally, Genesis includes complimentary scheduled maintenance for three years or 36,000 miles, along with connected services and map updates, further enhancing the ownership value proposition.
The GV80’s design language is stunning, featuring Genesis’s signature crest grille, elegant proportions, and thoughtful details that create visual interest without resorting to aggressive styling clichés.
The interior design philosophy emphasizes horizontal lines and open spaces, creating an airy, sophisticated atmosphere. Advanced safety features including forward collision avoidance, blind-spot monitoring with rear cross-traffic alert, and parking collision avoidance come standard.
For buyers seeking inline-six luxury without premium pricing, the Genesis GV80 3.5T represents perhaps the best value in the entire segment.
Also Read: Top 10 Luxury Bargains That Are Risky Without a Warranty
5. Mazda CX-90 Inline-Six
The Mazda CX-90 brings inline-six power to the mainstream three-row SUV segment, offering a level of refinement typically reserved for luxury vehicles at surprisingly accessible pricing.
Mazda’s longitudinally-mounted turbocharged 3.3-liter inline-six produces 280 horsepower and 332 lb-ft of torque in standard form, or 340 horsepower and 369 lb-ft when paired with the available mild-hybrid e-Skyactiv G system.
This represents Mazda’s first inline-six engine in decades, signaling the brand’s commitment to premium refinement as it positions itself upmarket from mainstream competitors.
What makes the CX-90 exceptional value is Mazda’s ability to deliver near-luxury refinement at mainstream pricing. The starting price undercuts luxury competitors by tens of thousands of dollars while providing comparable smoothness, quietness, and power delivery.
The inline-six engine operates with minimal vibration and produces a refined soundtrack that enhances rather than intrudes upon the driving experience. Mazda engineers have clearly labored to extract every bit of refinement from this powerplant, and the results are immediately apparent from the driver’s seat.
The CX-90’s interior quality surpasses expectations for its price point, featuring available semi-aniline Nappa leather, genuine wood trim, and thoughtful design details that create an upscale ambiance.
The eight-speed automatic transmission shifts smoothly and intelligently, while the available i-Activ all-wheel-drive system provides confident traction across various road conditions.
The ride quality strikes an excellent balance between comfort and control, with suspension tuning that absorbs road imperfections while maintaining composed handling characteristics.
Fuel efficiency is competitive despite the engine’s performance capabilities, with the mild-hybrid version achieving EPA estimates of 24 mpg city and 28 mpg highway. These figures represent genuine real-world efficiency that helps offset the premium unleaded fuel requirement.
The CX-90 can also tow up to 5,000 pounds when properly equipped, making it capable enough for families with boats or campers. The three-row seating accommodates six or seven passengers depending on configuration, with the second row offering exceptional space and comfort.
Compared to mainstream competitors powered by four-cylinder or V6 engines, the CX-90’s inline-six provides a noticeable advantage in smoothness and refinement. The engine’s inherent balance eliminates the vibrations common to four-cylinder engines while avoiding the slightly coarse character of many V6 configurations.
Advanced safety features including i-Activsense technologies provide comprehensive driver assistance capabilities that rival luxury competitors. For families seeking three-row capability with unexpected refinement at reasonable prices, the Mazda CX-90 represents outstanding value in today’s market.
6. BMW X3 xDrive30i
The BMW X3 xDrive30i proves that inline-six refinement can be enjoyed in a compact luxury SUV package, offering serious value for buyers who prioritize driving dynamics and efficiency.
While the X3 xDrive30i features a turbocharged 2.0-liter four-cylinder engine, BMW also offers the X3 with inline-six power in the M40i variant, which features a turbocharged 3.0-liter inline-six producing 382 horsepower and 369 lb-ft of torque.
This potent powerplant transforms the compact SUV into a genuine performance machine capable of accelerating from zero to sixty in just 4.4 seconds.
The value proposition of the X3 M40i centers on its ability to deliver M-car-level performance without the extreme pricing or compromised practicality of true M models.
The inline-six engine provides effortless power delivery across the entire rev range, with peak torque available from just 1,800 rpm extending all the way to 5,000 rpm.
This broad powerband ensures that the X3 M40i feels quick regardless of engine speed or driving situation. The engine’s soundtrack is particularly satisfying, producing a sporty growl enhanced by an active exhaust system that amplifies the inline-six’s natural character.
BMW’s eight-speed automatic transmission works brilliantly with the inline-six, providing lightning-quick shifts in Sport mode or imperceptible gear changes during normal driving.
The xDrive all-wheel-drive system sends power rearward under normal circumstances, maintaining BMW’s characteristic handling balance while providing enhanced traction when conditions demand. The M Sport suspension and steering deliver exceptional precision and feedback, making the X3 M40i genuinely enjoyable to drive on twisting backroads despite its SUV configuration.
The X3’s compact dimensions make it more maneuverable than larger siblings while still providing practical interior space for families. The rear seat offers legitimate adult accommodations, and the cargo area provides sufficient capacity for weekly shopping or weekend getaways.
BMW’s iDrive infotainment system remains one of the industry’s best, offering intuitive operation and comprehensive functionality. Premium materials and solid build quality create an upscale environment appropriate for the vehicle’s luxury positioning.
Compared to competitors like the Mercedes-AMG GLC 43 or Audi SQ5, the X3 M40i offers similar performance at competitive pricing while delivering superior driving engagement.
Fuel economy figures of 21 mpg city and 27 mpg highway are impressive given the performance capabilities. For buyers seeking a compact luxury SUV that prioritizes driving pleasure without sacrificing practicality, the BMW X3 M40i with its refined inline-six engine represents exceptional value in a package that’s easier to maneuver and park than larger alternatives.
7. Mercedes-Benz GLC 450 4MATIC
The Mercedes-Benz GLC 450 4MATIC brings the same excellent turbocharged 3.0-liter inline-six with EQ Boost mild-hybrid technology found in the larger GLE to the compact luxury SUV segment.
This sophisticated powerplant produces 362 horsepower and 369 lb-ft of torque from the combustion engine, with an additional 21 horsepower and 184 lb-ft available from the integrated starter-generator.
The result is a compact SUV that delivers impressive performance with zero-to-sixty acceleration in just 5.1 seconds while maintaining the refinement Mercedes-Benz customers expect.
The value equation for the GLC 450 centers on its ability to provide big-SUV refinement and technology in a more manageable, efficient package. The inline-six engine operates with exceptional smoothness, producing minimal vibration even under hard acceleration.
The mild-hybrid system enhances efficiency during city driving and provides instant torque response that eliminates any sense of turbo lag. The nine-speed automatic transmission shifts seamlessly, contributing to the refined character that defines the Mercedes-Benz experience.
The GLC’s interior showcases Mercedes’ latest MBUX infotainment system with a large touchscreen display, voice recognition, and augmented reality navigation that overlays directional arrows onto a live camera feed.
Available features including a Burmester surround sound system, ambient lighting, heated and ventilated front seats, and a panoramic sunroof create a luxurious environment that rivals vehicles from higher price segments. The build quality is exceptional, with tight panel gaps and premium materials throughout the cabin.
Compared to the high-performance AMG GLC 63, the GLC 450 offers similar levels of everyday usability and luxury at a significantly lower price point while consuming considerably less fuel.
The inline-six delivers more than adequate performance for real-world driving situations, and most drivers will appreciate the improved ride quality compared to the stiffly-sprung AMG variant.
Advanced driver assistance features including Active Distance Assist, Active Steering Assist, and Active Brake Assist provide cutting-edge safety technology. For buyers seeking compact luxury SUV refinement without compromising performance, the GLC 450 4MATIC represents outstanding value.
8. Land Rover Defender 130
The Land Rover Defender 130 offers inline-six power in one of the automotive world’s most iconic packages, combining legendary off-road capability with modern refinement.
The standard P300 engine is a turbocharged 2.0-liter four-cylinder, but the available P400 mild-hybrid powertrain features a turbocharged 3.0-liter inline-six producing 395 horsepower and 406 lb-ft of torque.
This sophisticated powerplant transforms the Defender from merely capable to genuinely quick, with zero-to-sixty acceleration in approximately 5.8 seconds despite the vehicle’s substantial weight and off-road-focused configuration.
The value proposition of the Defender 130 P400 lies in its unique combination of capabilities that no competitor can fully match. This vehicle delivers genuine Land Rover off-road prowess with features including locking differentials, configurable Terrain Response 2 system, impressive ground clearance, and wading depth capabilities up to 35.4 inches.
Yet the inline-six engine with mild-hybrid assistance provides refined on-road performance with smooth power delivery and respectable fuel efficiency for such a capable vehicle. The electric supercharger eliminates turbo lag, providing immediate throttle response from any speed.
The Defender’s interior blends rugged functionality with surprising luxury, featuring available Windsor leather upholstery, configurable ambient lighting, and Land Rover’s Pivi Pro infotainment system with dual touchscreens.
The 130 variant extends the wheelbase to accommodate third-row seating, creating an eight-passenger configuration that makes the Defender practical for larger families.
Despite its utilitarian roots, the attention to detail and build quality match luxury competitors, with robust materials designed to withstand harsh conditions while maintaining an upscale appearance.
Compared to traditional luxury three-row SUVs, the Defender 130 offers vastly superior off-road capability and distinctive styling that stands out in a sea of similar-looking competitors.
The inline-six engine provides sufficient power for towing up to 8,200 pounds when properly equipped, making it capable of hauling substantial trailers or toys.
For families seeking adventure-ready capability without sacrificing on-road refinement or the ability to accommodate seven or eight passengers, the Defender 130 P400 represents unique value that no conventional luxury SUV can match.
9. Jaguar F-PACE P400
The Jaguar F-PACE P400 brings British luxury and inline-six refinement to the performance SUV segment at pricing that undercuts German competitors while delivering comparable or superior capabilities.
Jaguar’s turbocharged 3.0-liter inline-six with mild-hybrid technology produces 395 horsepower and 406 lb-ft of torque, propelling the athletic SUV from zero to sixty in just 5.0 seconds.
This impressive performance is enhanced by the F-PACE’s lightweight aluminum-intensive construction, which helps the vehicle feel more agile and responsive than heavier competitors.
The value equation for the F-PACE P400 centers on its combination of performance, luxury, and distinctive styling at competitive pricing. The inline-six engine delivers power with exceptional smoothness, enhanced by the mild-hybrid system’s electric supercharger that eliminates turbo lag and provides instant throttle response.
The engine produces a satisfying growl under acceleration that reminds you of Jaguar’s sporting heritage, yet remains refined and quiet during normal driving. The eight-speed automatic transmission shifts quickly and decisively, contributing to the sporty character.
Compared to competitors like the BMW X3 M40i or Mercedes-AMG GLC 43, the F-PACE P400 offers distinctive styling and comparable performance at competitive pricing. Fuel economy figures of 19 mpg city and 25 mpg highway are reasonable given the performance capabilities.
The cargo area provides practical utility, while rear-seat space comfortably accommodates adults. For buyers seeking a performance-oriented luxury SUV with inline-six refinement and British character that stands apart from German alternatives, the Jaguar F-PACE P400 represents excellent value.
10. Jeep Grand Cherokee L
The Jeep Grand Cherokee L brings unexpected inline-six refinement to the American three-row SUV market, offering families serious value through its combination of capability, space, and smoothness.
While traditionally associated with V6 and V8 engines, Jeep introduced a turbocharged 3.6-liter inline-six Hurricane engine producing 510 horsepower and 500 lb-ft of torque in the high-performance variant, with a standard version delivering 420 horsepower and 468 lb-ft of torque.
This represents a significant technological advancement for Jeep, bringing modern inline-six efficiency and refinement to a brand built on American V8 heritage.
The value proposition of the Grand Cherokee L with inline-six power centers on its ability to provide robust American SUV capability with European-inspired refinement. The Hurricane inline-six operates with impressive smoothness for such a high-output engine, delivering power with minimal vibration or harshness.
The twin-turbo configuration ensures strong performance across the rev range, with peak torque available from extremely low engine speeds extending through the midrange.
This broad powerband makes the Grand Cherokee L feel effortlessly quick whether you’re merging onto highways or passing slower traffic on two-lane roads.
Compared to luxury three-row competitors, the Grand Cherokee L offers similar interior space and capability at significantly lower pricing.
The inline-six engine provides refinement that narrows the gap between Jeep and premium brands while maintaining the rugged capability Jeep customers expect.
Advanced safety features including adaptive cruise control, blind-spot monitoring, and automatic emergency braking come standard or available across the lineup.
For American families seeking three-row capability with unexpected inline-six refinement at accessible pricing, the Jeep Grand Cherokee L represents outstanding value in today’s market.
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