MERCEDES-BENZ has revealed details of two new V6 and V8 petrol engines, both utilising direct injection and multi-spark ignition technology to bring greater torque and fuel economy than their predecessors.
Both engines feature piezo-electric injectors similar to those of most new diesel engines, the resultant cooling effect allowing for higher compression and boost for the twin-turbo V8 engine.
Set to debut in the CL500, the twin-turbo V8 produces 320kW and an impressive 700Nm of torque. Stop/start technology contributes to fuel economy, and although Mercedes has yet to reveal specific consumption figures, a 22 percent improvement over the previous 5.4 litre V8 is claimed. Carbon emissions are listed at 225g/km.
The naturally-aspirated 3.5 litre V6 produces 225kW (up 25kW) and 368Nm of torque between 1800-3500rpm (up from 350Nm), with carbon emissions listed at 177g/km. The new V6 will debut in the S350, followed by the CL350.
The V6 engine has been redesigned with a 60 degree angle rather than the outgoing engine's 90 degree angle, giving it a more natural balance and allowing Mercedes to eliminate the balance shaft.
The new engines join Mercedes' new 5.5 litre V8, set to debut in the next-generation S63 AMG with a handy 400kW and 800Nm of torque. By comparison, the outgoing 6.2 litre V8 produces 390kW and 630Nm of torque.