4.0 TFSI EA839 in the A8. This 4.0-liter, twin-turbocharged V8 engine has tremendous torque and power. One of the most reliable Audi engines. It is a popular engine in the Audi performance series and powers the A6 and A7. The engine delivers a refined driving experience and, most crucially, it is a reliable motor. Adding a substantial 3.2 inches between the wheels but less than half that in overall length, the new 2005 Audi A6 4.2 Quattro now stretches out 193.5 inches and offers impressive handling and 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 Audi's AQH, AVP, AYS and BCS were 4.2-litre, 40 valve V8 engines that powered the Audi D2 S8 from 1999 to 2003. Effectively replacing the 4.2-litre 32 valve AHC/AKH engines, key features of the 40 valve AQH/AVP/AYS/BCS engines included: A cast aluminium alloy block with 90-degree ‘V’ angle; Die-forged steel crankshaft with five main bearings; The firing order is the same as the other AJ-V8 engines although the cylinder numbering is different (AJ37 = 1-5-4-2-6-3-7-8 vs. AJ26 = 1-2-7-3-4-5-6-8). The engine is assembled by hand at the AM facility in Cologne, Germany, which also builds the V12 for the DB9 and Vanquish. The cylinder block, cylinder heads, crankshaft, connecting rods In Dynamic mode, it howls and parps in true performance car style. With 444bhp, it’ll take you from 0-62mph in just 4.1sec and on to an electronically limited top speed of 155mph (this can be bN4dJF. The firing order is the same as the other AJ-V8 engines although the cylinder numbering is different (AJ37 = 1-5-4-2-6-3-7-8 vs. AJ26 = 1-2-7-3-4-5-6-8). The engine is assembled by hand at the AM facility in Cologne, Germany, which also builds the V12 for the DB9 and Vanquish. The cylinder block, cylinder heads, crankshaft, connecting rods A super-coupe with outstanding all-round abilities. RS5 has an exceptional breadth of capabilities. 4.2-litre V8 produces 444bhp. There are more involving coupes, but the RS5 still delivers in Powering the base model 2013 Audi A8 is a supercharged 3.0-liter V6 that produces 333 hp and 325 lb-ft of torque. All of this power is channeled through an eight-speed automatic transmission and 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. The Lexus LS (2012-2017) came in 4.6 V8 (LS 460) or 5.0-litre hybrid (LS 600h) forms. Both are incredibly refined, reliable and well equipped, but the Lexus is very rare. What to look out for

is the audi 4.2 v8 reliable