Efficient Dynamics technologies are fitted as standard, including lightweight body panels, brake energy regeneration and a system which cuts power to non-essential systems while accelerating.
At launch the saloon will be available with two petrol engines and one diesel, with the petrol variants also offered with a long wheelbase body.
All three are fitted with a six speed automatic gearbox and are more powerful than in the previous model, but with lower emissions and fuel consumption.
The diesel powered 730d is expected to be the biggest selling unit in the UK, taking 85% of sales.
This produces 192g/km CO2 and returns 39.2mpg, but is capable of sprinting to 62mph in 7.2 seconds on the way to a 153mph top speed.
Buyers can also choose a 2,979cc V6 or 4,395cc twin turbocharged V8 petrol engine, offering 325bhp and 407bhp respectively.
A six speed automatic gearbox is standard across the range.
Also standard is an 8GB hard drive for music storage, four zone air conditioning and Drive Dynamic Control which allows fine tuning of the car for different surfaces and driving styles.
Optional features include lane change and departure warning systems which can read speed limit signs, side vision cameras to improve visibility at junctions and night vision to detect pedestrians walking into the path of the vehicle.
Prices for the new 7-Series will be announced closer to the launch date.