Japanese Mazda model car kits. With the devlopement of the Rotary Engine technology, Mazda has proved they can offer a sports car with a high power lighweight and compact powerplant.
First using the rotary engines in their 1960s Cosmo Sport cars, then later in the RX-series (RX100, RX2, RX3 etc.) the engines became best know with their Mazda RX7 cars, starting around 1978.
Soon enthusiests were modifying the small rotary engines for their smooth but high revving power.
Mazda continued their RX7 cars up to 2002 with later Turbo versions for even more power, giving the RX7 a high standard of performance than most available small sports cars at the time.
Like muscle cars of the past, fuel mileage helped bring the end to the RX7 and it's beloved rotary engine.
While the engines were compact, easy to repair (there were only 3 major moving parts), and powerful for their size, it was difficult to boost their ability for fuel efficiency.
But Mazda RX7 enthusiests worldwide love their cars and they are very popular still today.