The “okay so how am I meant to deal with this?” situation. Named after the rotary Mazda RX-3 in Top Trumps that doesn't seem to be comparable in any meaningful way with the other engine categories.

The unique, and unscorable, Mazda RX-3
Dealer: (Triumphantly slapping down a Rover 3500 Van den Plas) Cylinders: VEE-EIGHT! BEAT THAT, SUCKER!!!
Second player: (Patiently lays the Mazda with a cryptic smile) AHA!! TWO WANKEL ENGINES!
Everyone: Err...

So now what are you supposed to do? (NB: Dilemma comes from a time pre the Internet)

See also