S7 engines
For years, Audi has used turbocharging in its winning racecars. That know-how has trickled down to road engines in a big way with the 4.0-liter TFSI® engine used in the Audi S7.
Featuring two turbochargers nestled between the cylinder-banks ‘inside the V’ and paired with an enhanced Audi valvelift system that improves exhaust gas flow to the turbocharges which helps enhance throttle response, this rumbling engine delivers 420 horsepower and 406 lb-ft of torque, both accessible over a broad range of engine speeds. And for the times you don’t need 420 horsepower to cruise at a relaxed speed, nor do you need eight turbocharged cylinders. At these moments, the 4.0-liter TFSI® engine in the Audi S7 has been designed to shut down four of the eight cylinders essentially running as a V4 engine.
| 4.0 TFSI® Engine Specification | |||
|---|---|---|---|
| Cylinder Block | Aluminum alloy | ||
| Arrangement | Front mounted, longitudinal | ||
| Cylinder Head | Aluminum alloy | ||
| Bore | 3.33 in. [84.5 mm] | ||
| Valve Train | DOHC, mechanical charger module with 2 intercoolers, 2 charge movement plaps, chain driven, continuous camshaft adjustment for the intake & exhaust valves, 4 valves per cylinder | ||
| Stroke | 3.50 in. [89.0 mm] | ||
| Fuel Injection | Audi FSI® direct fuel injection | ||
| Type | 4.0-liter Turbocharged DOHC V8 gasoline engine with Audi FSI® direct injection | ||
| Displacement | 4.0 liter [243.6 cu in., 3993 cc] | ||
| Fuel Requirement | Premium unleaded | ||
| Compression Ratio | 10.1:1 | ||
| Power and Performance | |||
|---|---|---|---|
| Fuel Estimates | 17/27/20 mpg | ||
| 0-60 mph | 4.5 sec. | ||
| Top Track Speed | 155 mph | ||
| Horsepower | 420 hp @ 5500 rpm | ||
| Torque | 406 lb-ft @ 1400 rpm | ||
