Stage set for the Class 1 era: A detailed look at the new BMW M4 DTM for the most powerful DTM ever.

Munich. 2019 welcomes the new Class 1 era in the DTM. BMW M
Motorsport has built the most powerful DTM car ever: the BMW M4 DTM,
has been modified in accordance with Class 1 regulations. At the
heart of the car is the newly developed BMW P48 two-litre turbo
engine. Combined with a significantly lighter car, the performance
figures are nothing short of impressive and allow speeds of up to
300 km/h. We give you an overview of the main differences between
this season’s race car and the 2018 version.


 
Engine / exhaust system.

The biggest innovation in the BMW M4 DTM is the engine. The
four-litre V8 engine P66 has been replaced by a state-of-the-art,
newly developed turbo engine – the P48. The capacity of this power
unit is only half that of its V8 predecessor, yet it still generates
far more power with less consumption. Like the BMW production engines,
the P48 is a turbocharged, straight two-litre engine with direct fuel injection.

The exhaust system had to be redesigned completely for the new
turbo engine. The BMW M4 DTM, in accordance with Class 1 regulations,
has a much shorter exhaust pipe on only the right side of the car. The
end of the exhaust pipe is located towards the centre of the door,
next to the vents. Unlike in the past, there is no second exhaust pipe
on the left side of the car.

Push-to-Pass.

The DTM has introduced a push-to-pass function for the first
time in 2019. At the touch of a button, the drivers can call on up to
30 PS of extra engine power. This is possible using an additional
standard part, the fuel flow restrictor. The increase in power is
achieved by temporarily allowing more fuel to be injected into the
four cylinders of the P48 turbo engine.

Rear wing / DRS.

The rear wing of the BMW M4 DTM is 520 millimetres wider than
that on the 2018 car. It also has just one section. The DTM adopted
the concept of the standard part from the Japanese Super GT
Championship. The rear wing still has DRS (Drag Reduction System), in
the form of a pneumatic flap mechanism, which reduces the amount of
aerodynamic drag generated by the car.

Car weight.

The mandatory weight of the new BMW M4 DTM when empty is now
less than 1,000 kg. The car must now weigh a minimum 981 kg without
driver or fuel. That is 50 kg less than last season. The combination
of more engine power and less weight means the BMW M4 DTM has a
significantly lower power to weight ratio of 1.6 kg/hp. This should
ensure that the cars reach the 300 km/h mark on the fastest sections
of track on the DTM calendar, such as the Parabolica at the Hockenheimring.

Number plate.

In accordance with Class 1 regulations, there will be no number
plate on the BMW M4 DTM in 2019. This increases the size of the
intakes for the cooling system. The opening of the characteristic BMW
radiator grill has also been optimised.

Cooling vents.

The size of the cooling vents in the bonnet has been increased
significantly for the intercooler of the two-litre turbo engine.

Front splitter.

The protrusion of the front splitter has been reduced by up to
90 millimetres. This modification makes the BMW M4 DTM more robust in
wheel-to-wheel battles.

Diffuser.

The diffuser on the BMW M4 DTM has been lowered by 30
millimetres and the start of the diffuser ramp has been moved back 870 millimetres.

Rear windscreen.

The vent on the rear windscreen of the BMW M4 DTM is also new.
It allows optimised ventilation of the interior.

Other than that, the aerodynamics remain unchanged compared to
2018. With this combination of tried-and-tested and modified
aerodynamic components, the focus shifts even more firmly towards the
driver. At the same time, it avoids an aerodynamic arms race between
the manufacturers.

Interior.

The new firewall in the interior, which shields the cockpit
directly behind the driver, makes the car even safer. As a
consequence, there is no interior mirror from 2019. Instead, the BMW
M4 DTM is equipped with a rear-view camera and display.