With the Audi RS5, Senner Tuning took all the usual steps: some exterior appointments, upgraded suspension and of course, more power. Starting with the engine modifications, the 4.2-liter direct-injected V8’s output was boosted to 506 hp (+56 ponies) and 478 Nm or (353 lb-ft (+48Nm or 36 lb-ft), by letting it “breathe” more efficiently through a new, valve-controlled stainless steel exhaust system. Thanks to these changes, the modified RS5 accelerates from standstill to 100 km/h (62 mph) in 4.2 seconds, or almost half a second faster than the stock model. Read more »