Potent V8 for all-new M3

AutoTrader NZ
Published 3 September 2020

BMW has given its pocket supercar, M3 Coupe a potent V8 for its fourth generation model. It’s the first M3 to have an eight-cylinder engine.

The 4.0-litre V8 develops maximum output of 309kW and a punchy 400Nm of peak torque at 3900rpm.

Maximum engine speed is 8400 rpm with 85 percent of peak torque available up to 6500rpm.

The engine block is made in BMW’s light-alloy foundry in Landshut near Munich, which also builds the engine blocks for the BMW Sauber Formula 1 cars.

The crankcase is made of a special aluminium/silicon alloy eliminating the need for conventional cylinder liners. The iron-coated pistons run directly in these uncoated, honed cylinder bores.

Weighing just 202kg, the V8 engine is a genuine lightweight. The lightweight design gives the new M3 a power-to-weight ratio of 3.8kg per horsepower.
BMW says the M3 will accelerate to 100km/h in 4.8 seconds.

Top speed is limited electronically to 250km/h.

The V8 has BMW’s variable double-VANOS camshaft control. Keeping valve timing extremely short and quick, it reduces charge cycle losses and, in the process, improves engine output, torque and responsiveness. It also helps reduce fuel consumption and exhaust emissions.

A low-pressure version of double-VANOS has been developed especially for the V8, ensuring extremely fast valve timing even under normal engine oil pressure.
A separate throttle butterfly for each cylinder reflects the racing engine technology.

Power is transmitted to the rear wheels by a six-speed manual gearbox and a brand-new final drive. The final drive on the BMW M3 comes complete with a variable M differential lock providing up to 100 percent locking action in a completely variable process whenever required. That ensures optimum traction on all surfaces.

The engine’s electronic management is another new development. Ion flow technology detects the risk of the engine knocking or misfiring and mis-combustion in each cylinder via the sparkplug and controls the problem accordingly.

At the same time, the system checks the ignition and recognises any misfiring, the sparkplug serving as an actuator for the ignition and as a sensor monitoring the combustion process. Intelligent energy management featuring Brake Energy Regeneration further enhances the V8’s efficiency.

The power required for the onboard network is generated specifically during overrun and during braking, charging the car’s battery without taking up any of the energy contained in the car’s fuel.

BMW says the M3’s fuel consumption in the EU test cycle is 12.4 litres/100km.
An all-new suspension system with special, weight-optimised components, as well as axle kinematics, is designed to provide sporting dynamics.

The driver uses MDrive to set and retrieve a specific configuration of the engine control map, suspension and dynamic stability control set-up.

The new M3 has a carbon-fibre-reinforced roof to reduce and lower the centre of gravity.

The bonnet gets a powerdome and the two air intake openings. The car has function-oriented front and rear spoilers.

The new M3 arrives in New Zealand in early October. There’s no indication yet of pricing.