Audi has revealed a diesel version of the Audi SQ5 performance SUV ahead of its public premiere at the Geneva motor show.
The new SQ5 TDI, which introduces a newly developed mild-hybrid diesel powertrain, is planned to go on sale in the UK later this year.
Its driveline features Audi’s latest turbocharged 3.0-litre V6 diesel engine, coupled to a 48V electrical system. This powers a small 7kW electric motor, which operates an electric compressor (as used on the larger Audi SQ7).
Mounted downstream of the engine's variable-vane turbocharger, the compressor is designed to boost induction for a reduction in lag and added low-end performance at engine speeds of up to 1650rpm. It's claimed to be capable of producing up to 1.4bar of pressure, compared with the 2.4bar of the turbo.
With 342bhp and 516lb ft, the powertrain delivers 7bhp more power, and the same torque, as the original SQ5 TDI Plus. By comparison, the existing 3.0-litre petrol V6-powered SQ5 produces 349bhp and 369lb ft. Audi quotes a 0-62mph time of 5.1sec and a top speed of 155mph for the four-wheel-drive SQ5 TDI.
The SUV's mild hybrid system includes a belt-driven alternator starter (BAS) connected to the crankshaft. During braking, this is claimed to be capable of recuperating up to 12kW of kinetic energy, which is then stored in a lithium ion battery mounted under the boot floor.
Further options include an adaptive air suspension in place of the standard steel spring set-up, which comes with adaptive dampers and a 30mm reduction in ride height over the standard 
