Front-wheel drive will be standard though all-wheel drive will be an option. It’s too early to talk powertrains but expect units coming with three-, four- and six-cylinder configurations, in diesel and petrol flavours. A hybrid option is also likely. Efficiency is on everyone's minds at the moment. Following the lead set by the Passat GTE, Opel will reportedly combine electricity and a petrol engine to make a plug-in hybrid version of its big car, probably using one of its smallest turbocharged mills.