What about the Wankel Engine??

[babel17]

The one thing i have not seen yet in this thread is a post from someone that actually drives an rx7 or the like.

I owned an 82 RX7 with the infamous 12a motor. I bought it after it already had over 200,000 miles on it. The previous owner used it mainly for a 50 mile daily commute. I blew the apex seals after driving it about 6000 miles.

I guess it is how you drive.

But, I now own an RX8, and I just aint happy until I hear the rev limiter ding. Wonder how many miles I'll get.

[bullitproof7]

Rotary engines were used in Mercedes Benz pre 70s i think they were racing them,while the mazda 10a was pretty lame the 12a and 13bs with or without turbos offered a great platform to build on that didnt require all the internals a v8 had ,the pistons broke if you even thought about performance modifactions,a rotor can be modified easier and was not as expensive to extract some big hp or 1/4 mile times.Two things in its favour are its revving capabilitys and its light weight compared to some V8s.Now with 20bs things have progressed again and gotten quicker.PACPERFORMANCE ran a 6.96 400m with there 20b 2 weeks ago at the jamboree.THAT WAS FULLY SIK
My s2 rx7 with a PAC built s413bt ran a best of 12.7 on street tyres

[Matra et Alpine]

Mercedes only ever put the rotary in the first prototype C111s.
That was their test-bed for the technology.
I wasn't aware that any had ever been raced seriously.
The latter C111s that stormed the record books were DIESEL powered

[h00t_h00t]

Rotary engines were used in Mercedes Benz pre 70s i think they were racing them,while the mazda 10a was pretty lame the 12a and 13bs with or without turbos offered a great platform to build on that didnt require all the internals a v8 had ,the pistons broke if you even thought about performance modifactions,a rotor can be modified easier and was not as expensive to extract some big hp or 1/4 mile times.Two things in its favour are its revving capabilitys and its light weight compared to some V8s.Now with 20bs things have progressed again and gotten quicker.PACPERFORMANCE ran a 6.96 400m with there 20b 2 weeks ago at the jamboree.THAT WAS FULLY SIK
My s2 rx7 with a PAC built s413bt ran a best of 12.7 on street tyres

The 20b has the advantage of and extra rotor. Hence all the power.