This new spy video shows the latest iteration of BMW’s M5, and there's a big shift in the engineering this time round. Following the fashion for downsizing and turbocharging, the current 5.0-litre V10 is ditched for a new twin-turbo 4.4-litre V8.
Despite the capacity shrinkage, power will increase as the F10-generation M5 will sport 578bhp, whereas the previous generation mustered 'only' 500bhp. Torque swells too, up to 531lb ft from the 398lb ft of today's M5. The Mercedes E63 AMG, by comparison, has 518bhp and 464lb ft.
How does all this power affect the BMW M5's economy?
BMW is aiming for a 30% reduction in fuel consumption, which would equate to 24mpg and 258g/km, an ambitious target. The Efficient Dynamics programme has been rolled out for the F10, and the M5 will be no exception.
What of the old car’s problems?
The oft-criticised seven-speed automated manual will be replaced with an eight-speed dual-clutch gearbox. The big news is that there will be no M5 Touring for the F11 estate. We won’t officially see the F10 M5 until 2011.