The Audi RS 7 Sportback has a V8 4.0 TFSI engine that features the innovative new Audi cylinder on demand. This ensures that during partial load C15operation, only four of the eight cylinders are used – without you noticing the difference. The engine always runs smoothly and powerfully, but it uses less fuel and emits less CO.
We describe its mode of operation as ‘intelligent performance’. Audi cylinder on demand selectively closes certain cylinders, two per cylinder bank. As a result the engine runs impressively smoothly even during partial load operation. The deactivation depends on several factors: the revs are between 960 and 3,500, the engine temperature must be at least 30 °C and you must be in at least third gear. If you do not need the full power of eight cylinders, the Audi valvelift system closes the intake and outlet valves and switches off the injection and ignition of the corresponding cylinders. This means that neither is air taken in and fuel injected, nor is exhaust gas emitted. In other words; the consumption and emission values are noticeably improved.Thanks to its very spontaneous responsiveness and exceptional power delivery across the entire engine speed range, the 8-cylinder engine promotes an impressive driving style.