In some ways, the S5 is reassuringly familiar, because here stands a compact estate car with a petrol V6 engine. Beruhigung durch Tradition, or something. Actually, that’s not fair, because there are plenty of changes from the old S4.
First off, this car isn’t actually all that compact any more. It has grown 67mm in length and 13mm in width, making it very similar to an early-2000s Audi A6. It remains manageable, but I can’t help but wonder where the bloat will stop.
We can’t even blame an all-new platform, because while it has a new name (Premium Platform Combustion, or PPC), it’s really an evolution of what went before.
The A5 remains slightly unusual among similarly sized Volkswagen Group cars (like the Skoda Superb and VW Passat) in carrying its engine lengthways rather than transversely. This layout enables it to have that V6, send most of its power to the rear wheels if the situation calls for it and ride on more sophisticated suspension (four-link front, five-link rear) than an MQB-based car.
The most interesting development is in the powertrain. The 3.0-litre V6 is fundamentally a familiar one, but it’s now a hybrid. Audi calls the new hybrid system MHEV Plus, even though it’s not mild at all. As well as the usual integrated starter-generator that handles the start/stop, there’s an electric motor acting on the output side of the gearbox that can regenerate up to 25kW of energy and contribute 25bhp, either to augment the engine or to power the car by itself and allow the engine to shut off.