Just noticed the MPG ratings, these seem better than I would have expected (if they pan out):
At launch, diesel power comes from a choice of four-cylinder D200 or D240 engines, with sequential twin turbo technology providing 430Nm of torque to optimise performance and economy. The D200 delivers fuel economy of 37.2mpg (7.6 l/100km) and 0-100km/h in 10.3 seconds (0-60mph in 9.9 seconds) while the more powerful D240 matches the 200PS for efficiency while accelerating from 0-100km/h in 9.1 seconds (0-60mph in 8.7 seconds). Both provide competitive CO2 emissions of 199g/km (NEDC equivalent).º
Petrol customers will be able to choose between a turbocharged four-cylinder P300 engine and an efficient six-cylinder P400 MHEV powertrain. The 300HP unit uses an advanced twin-scroll turbo for smooth performance and efficiency, accelerating from 0-100km/h in 8.1 seconds (0-60mph in 7.7 seconds) with CO2 emissions as low as 227g/km (NEDC equivalent).º
The state-of-the-art MHEV powertrain harvests energy normally lost during deceleration and redeploys it to optimise efficiency. The in-line six-cylinder Ingenium petrol features both a conventional twin-scroll turbocharger and an advanced 48-volt electric supercharger, with a belt-integrated starter motor in place of the alternator to assist the petrol engine, and a 48-volt lithium-ion battery to store energy captured as the vehicle slows down. In combination, these advanced technologies provide 400HP and 550Nm of torque, 0-100km/h in 6.4 seconds (0-60mph in 6.1 seconds) and fuel consumption as low as 29.4mpg (9.6l/100km) with CO2 emissions of 220g/km (NEDC equivalent).º