You might be surprised to find out that despite DTM cars being some of the fastest tin-top vehicles in the world, the series will soon be switching from naturally aspirated V8s to tinier, 2.0-liter four-cylinder engines.

Race fans will certainly mourn the loss of the hairy-chested DTM V8s, but the 2.0-liter turbo fours powering future DTM cars will be some of the most impressive small displacement engines in the world.

Audi recently released details on its 2.0-liter turbo four DTM engine ahead of the racing season, which will not only be more fuel efficient than the DTM V8, but more powerful as well. The engine will make 610 hp and can briefly make as much as 640 hp when the driver uses the "push-to-pass” system, which provides a brief 30 hp boost.

Audi 2.0 TFSI DTM 2019​

DTM teams will also be limited to just 95 kg of fuel per race, forcing manufacturers to strike a balance between performance and efficiency with the new engines. This will hopefully result in more track-to-street tech transfer for Audi, BMW and series newcomers Aston Martin.

"The specific consumption of the DTM engine is extremely low and now within ranges that used to be typical for diesel engines," explained head of engine development at Audi Motorsport, Ulrich Baretzky. "In terms of weight and lightweight design – especially in the context of avoiding CO 2  emissions – we’re pointing out a few approaches that will hopefully find their way into future road-going vehicles – like in the case of the first TFSI for Le Mans and the TDI.”

Audi RS 5 DTM, René Rast​

DTM uses 98 octane pump gas, so this engine makes as much as 640 hp without the use of racing fuel. Interestingly, Audi said the use of this fuel is "conducive to the technology transfer from motorsport to production," and claims this engine is "ready for the use of alternative fuels enabling extremely eco-friendly operation of high-efficiency internal combustion engines."

Getting some ideas, are we, Audi?

The 2019 DTM season will kick off at the Hockenheim Ring in May.