The 2018 Audi RS4 Avant has a wider body, AWD, a 2.9-liter twin turbo V6 with 331kW (450hp) and 600Nm (443 lb-ft), and an 8-speed automatic.
The Mark IV Volkswagen Golf grew larger, gained a more formal set of bodies, and got a high quality interior full of soft touch plastics and damped handles.
No diesel engine option will offered with all-new B9 Audi A4 which will go on sale in the US from March 2016. You can probably blame dieselgate for that.
The B9 Audi A4 Allroad Quattro has extended fenders, an extra 34mm (1.3 inches) of ground clearance, revised styling, and standard AWD.
The new 2015 Audi A4 sedan and wagon don’t look too different from the outside, but it’s now based on VW’s MLB platform and there’s new tech galore.