Had a somewhat random thing I was wondering about with Mazdas. With their RX series, they came out pretty much in the order of their numbers. I don't think there was an RX-1, but the RX-2 through RX-5, 7, and 8 are all accounted for, and I'm pretty sure there was an RX-6 somewhere.

But with the MX's, there was an MX-3, 5, and 6. But I've never heard of an MX-1, 2, or 4. Anyone know if these appeared on something - concept cars, stuff not sold here, or the like?

 

The first Rotary powered Mazda Car was the R100. The the RX series of cars. So their was no RX1 but an R100 instead. Here is info on the R100 and other Mazda rotary powered cars:

http://www.mazdarotary.net/