The All new Audi A4 2014 with a Hyrbid engine

Audi's biggest selling car, the A4, will be replaced in two years' time and it will be code-named B9, the new saloon arrives first in 2014, followed by the A4 Avant in early 2015. It'll be the first Audi to premiere the company's new electric Quattro drivetrain and it will have not one, but two hybrid options. So while the A4 still looks recognisably like an Audi saloon, the technology that will underpin the sober body is radically new. Audi plans to launch its first plug-in hybrid system on the new A4, and we can also expect to see the company's new e-quattro system, which drops the mechanical diffs and prop shafts required for today's Q cars in favour of an electrically driven rear axle. It adds two e-motors delivering a combined 136bhp to power the rear wheels. There'll be a conventional front-wheel drive plug-in hybrid options too. The B9 PHEV is mated with a 226bhp 2.0-litre petrol engine and a 35bhp electric motor integrated in the transmission tunnel. As far as conventional drivetrains go, highlights for the new A4 include a more potent 225bhp 2.0-litre petrol-fed four cylinder engine and the long overdue high-end 2.0-litre TDI rated at 197bhp and 295lb ft. The Multitronic transmission disappears for good and all engines meet the new EU6 regs.