Otherwise, it's electronically limited to 155mph as standard. It feels every inch that fast on the road. At 1745kg, you wouldn't describe the RS4 Avant as lightweight, but it does weigh 125kg The Audi A4 Avant is offered with the powerful and efficient 45 TFSI petrol engine, generating 183 kW and featuring a 12 volt mild hybrid system with a belt-driven generator and a lithium-ion battery, which aids in increased efficiency. This impressive drivetrain features Audi quattro with ultra-technology, which utilises front-wheel drive for 2024 Audi A4 Avant new spy photos. 22 Photos. Shaping up to be a handsome wagon, the new A4 Avant in prototype guise appears to be a high-end version judging by the two-tone wheels and intricate bgkgNK.