Engines are the heart of every car, defining its performance, sound, and personality. While modern vehicles are shifting towards electric motors, traditional internal combustion engines remain a critical component of many automobiles.
The reliability of an engine can make or break a car’s reputation, as poorly engineered engines lead to frequent repairs and high maintenance costs.
Different regions of the world have produced their own unique and exceptional engines, with European manufacturers standing out for their innovation. While European engines sometimes lack the reliability of their Asian counterparts, several remarkable models deserve more recognition.
1. Volkswagen AQN / AGZ (2.3 VR5) – A Unique Powertrain
Volkswagen’s 2.3-liter VR5 engine, used in the Mk4 Golf and other models, was a unique and innovative powertrain. This five-cylinder engine was a derivative of the VR6, providing a distinct sound and respectable performance with 170 horsepower.
Introduced in the late 1990s, this engine showcased Volkswagen’s commitment to creative engineering. Despite its unusual configuration, the VR5 proved to be fairly reliable and offered a fantastic driving experience.
Though often overshadowed by more conventional engines, the VR5 remains a beloved choice for enthusiasts who appreciate its distinctive characteristics.
2. Mercedes-Benz OM646 (220 CDI) – A Durable Diesel
The OM646, a 2.1-liter turbodiesel engine, is one of Mercedes-Benz’s most durable powerplants. Found in cars with the 220 CDI badge, this engine was widely used in Europe but was largely absent in North America.
With power outputs ranging from 87 to 168 horsepower, it became popular among taxi drivers due to its ability to exceed 600,000 miles with proper maintenance.
While early 2000s Mercedes models suffered from reliability issues, the OM646 stood out as an exception, proving that diesel engines could combine efficiency, longevity, and performance.
3. Peugeot / Citroën DW10 (2.0 HDI) – France’s Reliable Diesel
French cars have a reputation for being unreliable, but the 2.0-liter DW10 HDI turbodiesel engine defied expectations. Produced by PSA Group, this engine powered various Peugeot, Citroën, Ford, and Volvo models throughout the 2000s.
Known for its longevity, the DW10 could easily surpass hundreds of thousands of miles with proper maintenance. While French cars are often ridiculed for electrical issues, this engine proved that their diesel technology could compete with the best in the industry. Its durability and efficiency made it a preferred choice for many European drivers.
4. Volkswagen AWX (1.9 TDI) – The Indestructible Diesel
Volkswagen’s 1.9-liter TDI, particularly the AWX variant, has earned legendary status for its durability. Despite its reputation for high emissions and smoky exhausts, this engine has remained a workhorse for many European drivers. Producing 130 horsepower, the AWX TDI powered various Volkswagen models, including the Golf, Jetta, and Passat.
Known for its reliability, ease of maintenance, and excellent fuel economy, the 1.9 TDI remains a popular choice in the used car market. It is especially favored in colder climates, where it excels at starting in harsh winter conditions.
5. Audi 4.2 FSI V8 – A High-Revving Masterpiece
Audi’s 4.2-liter FSI V8 engine, used in models like the RS4, RS5, and even the R8 supercar, is a true gem. This naturally aspirated engine could rev beyond 8,000 RPM and deliver exhilarating performance.
Producing exceptional power and an intoxicating sound, it also found a home in the Audi Q7 and Volkswagen Touareg. While Audi’s engine reliability can be hit-or-miss, the 4.2 FSI has proven to be durable when properly maintained. With its combination of power, sound, and engineering excellence, this V8 remains one of Audi’s best offerings.
Also Read: 10 Best Diesel SUVs for Towing Long Distances in 2025 With Power and Efficiency
6. Jaguar AJ34 (4.2 V8) – A British Surprise
British cars often suffer from reliability concerns, but the Jaguar AJ34 V8 stands out as a surprisingly dependable engine. This 4.2-liter powerplant, available with or without a supercharger, was used in Jaguar and Land Rover models such as the XJR and Range Rover Vogue.
While Jaguar’s reputation for reliability is often questionable, the AJ34 V8 has been known to last well beyond expectations. Offering a blend of power and refinement, this engine is one of the few bright spots in the history of British automotive engineering.
7. Volkswagen BUB (3.2 VR6) – A Compact Powerhouse
Volkswagen’s VR6 engine, particularly the 3.2-liter BUB variant, gained a cult following due to its unique design and sound. Featured in the Golf R32, this engine delivered 237 to 250 horsepower, depending on the generation. Its narrow-angle V6 layout allowed for a compact design while still delivering excellent performance.
Though complex, the VR6 was over-engineered, leading to impressive longevity. Capable of handling high mileage and heavy modifications, the VR6 remains a favorite among Volkswagen enthusiasts and continues to be revered for its distinctive character.
8. Fiat Family C 2.0 I5 (20V Turbo) – An Italian Performer
Fiat’s 2.0-liter five-cylinder turbo engine, known as the Family C 20V Turbo, offered an exciting blend of performance and character. Found in the Fiat Coupe and Bravo HGT, this powertrain produced up to 217 horsepower and 229 lb-ft of torque.
While Italian cars are often associated with reliability concerns, this engine was surprisingly robust when properly maintained. With its engaging driving dynamics and unique five-cylinder sound, the 20V Turbo remains an underrated gem in Fiat’s engine lineup.
9. Ferrari F133 (5.5 V12) – A Surprisingly Reliable Supercar Engine
Ferrari is not known for reliability, but the F133 5.5-liter V12 engine in the 550 Maranello defied expectations. Producing 478 horsepower and 419 lb-ft of torque, it was one of the last Ferrari V12 engines available with a manual transmission.
While maintaining a Ferrari is expensive, the F133 has shown remarkable durability compared to other high-performance engines. With proper care, this V12 can outlast many of its peers, making it one of Ferrari’s most enduring and respected powertrains.
10. Fiat / Alfa Romeo 2.4 JTDm – A Diesel with Character
Alfa Romeo’s 2.4-liter JTDm diesel engine powered the stunning 159, Brera, and Fiat Croma. Despite Alfa Romeo’s reputation for questionable reliability, this engine was an exception. With up to 207 horsepower and a robust cast-iron block, it could easily surpass 250,000 miles.
Combining performance, torque, and efficiency, the 2.4 JTDm was one of the more reliable diesel engines from an automaker known more for passion than longevity. It remains a solid choice for those looking for a dependable yet characterful European diesel engine.
While European manufacturers have faced criticism for reliability, they have also produced some of the most innovative and enduring engines in automotive history. From Volkswagen’s unique VR5 and VR6 designs to Ferrari’s surprisingly durable F133 V12, these engines have defied expectations.
Diesel powerhouses like the OM646 and 2.4 JTDm have proven that European automakers can build reliable engines when properly engineered. While not all European engines enjoy the same reputation for longevity as their Asian counterparts, many have stood the test of time and deserve more recognition.
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