The mighty 4.2 is based on Audi's 4.0 V8, but features heavy revisions throughout to produce more power and better reliability. The interesting thing about the bigger V8 is that it has been utilized in two very different applications - as a quiet and comfortable luxury motor in the Q7, and as an all-out, high revving motorsport beast in the Used Ford E-Transit-Cargo-Van in Morristown, NJ. New Toyota Gr-Supra for Sale in Laurel, MS. Used Aston-Martin Rapide in Dallas, PA. View all 26 consumer vehicle reviews for the Used 2010 Audi S5 Powering the 2015 Audi RS 5 is a 4.2-liter V8 engine that produces 450 hp and 316 pound-feet of torque. The transmission is a seven-speed dual-clutch automated manual with shift paddles. All-wheel But it’s not so easy to generalize about reliability for turbocharged engines. You have to look at the powertrain and the model as a whole.” Turbocharged engines are often paired to eight 2012 Audi A8 4.2 V8. Locked post. New comments cannot be posted. i think its just the american mindset that reliability is better if you dont spend a single cent In a slight twist, one of the most reliable used Volkswagen engines was originally designed by Audi, Haynes reports. The 1.8-liter turbocharged four-cylinder ‘EA113’ engine was introduced in the 1997 Audi A4, Grassroots Motorsports reports. But after the TT got it in 2000, Volkswagen put it in the 2002 Golf GTI, MotorTrend reports. The 4.0 has a rather sophisticated version and hopefully this new Audi system will keep too many carbon deposits from forming. Our 4.0's have large oil droplet accumulation and small oil droplet accumulation mechanisms. The old 4.2L V8, in the RS4 e.g., was notorious for carbon deposits as early as 10,000 miles! Ack! Thread. 1 1. A8 / S8 (D4 Platform) Discussion - 2011-2012 4.2 A8 issues? Any catastrophic failures - I am looking to buy a 2011-2012 A8 L with high miles over 130k-150k miles to use as a daily. I will most likely buy out of state the cheapest and drive back cross country or from auction. Ultimately, the most reliable V8 engine will depend on a variety of factors, including the specific application and the individual preferences of the driver. However, by considering the factors that contribute to reliability and examining the track record of different engines, it is possible to make an informed decision when choosing a V8 engine. Hello all, this will be my first of probably many posts. I hope to learn some good information here! I am looking at purchasing a 2012 Audi A8 L Quattro with the 4.2 V8 engine. I inquired the dealer to send me the vehicle history report and service records, they have yet to do so but the car appears to be in good condition and well kept. 05rmjv.