BMW has announced new trim packages and powerplants for its 7-Series limo including the debut of the updated straight six diesel, four-wheel drive and an M-Sport package.

The ‘new’ diesel engine, which we reported on earlier this week, features more power and torque than the older version while still offering improved fuel economy and lower CO2 emissions. The new version will be badged as a 740d and BMW claim that it will hit 62mph in just 6.3 seconds.

BMW’s xDrive four-wheel drive system will be available for the 7-Series for the first time on the 750i and long-wheelbase 750Li, both of which are fitted with the company’s 407bhp twin-turbo V8. The system distributes power to all four wheels, all the time, but is constantly variable via an electronically controlled multi-plate clutch. The standard torque distribution front to rear is 40:60, but up to 80-percent can be set to the rear wheels during cornering to ‘eliminate understeer’ before returning to normal to maximise traction as steering lock is unwound.

BMW has now also made its M Sports modifications available on the 7-Series for the first time. There are no mechanical changes – aside from BMW Dynamic Drive being made available – but a series of M-branded visual modifications can now be fitted.

External options include the M Sports aerodynamics package, which features new front and rear bumpers with ‘additional chrome’, illuminated entry trim and BMW Individual High Gloss Shadow Line. Whatever that is. Customers also get the option of an exclusive Carbon Black Metallic paint scheme and a choice of 19- or 20-inch M-light alloy wheels, both of which are ‘double spoke’ design and feature different front and rear tyre sizes.

Inside, M-branded leather-trimmed sports seats, leather steering wheel and footrests are available.

The BMW M Sports Package offered on all 7 Series with both normal and extended wheelbase.