Guess That Car game - By Clues Only

Yup, that's the one, The DKW Monza, based on the DKW 3=6, which makes no mathematical sense at all. The radiator is located behind the engine, hence the wrong way round engine bay.
 
Phew... This one kept me going in circles :p

Next one then:
1. When it was presented it wowed the audience who saw it.
2. It was built to race in a specific class of a specific national championship.
3. Curiously, each of its main competitors in that class has a different engine configuration.
 
No to all.

One more clue then:
1. When it was presented it wowed the audience who saw it.
2. It was built to race in a specific class of a specific national championship.
3. Curiously, each of its main competitors in that class has a different engine configuration.
4. It was presented at the Geneva Motorshow.
 
Could it be the Porsche 917? It's a bit old... but it was released at the Geneva Motorshow and it wow'd people
 
Nope.

One more clue:
1. When it was presented it wowed the audience who saw it.
2. It was built to race in a specific class of a specific national championship.
3. Curiously, each of its main competitors in that class has a different engine configuration.
4. It was presented at the Geneva Motorshow.
5. It is powered by a V8 engine.
 
BMW M3 Race car? I'm just guessing wildly now.
 
Was the championship in Europe?
 
Was it group B? So much awesome came from Group B.
 
The championship was in Europe but it wasn't about rally.
OT: It's hard to find something that came from Group B that wasn't awesome.
 
Hmm, was it in a GT championship?
 
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