I've got a few:
- The Toyota GT-One was homologated because the rules said the mandatory road car had to have a luggage compartment big enough for a suitcase. Toyota's response? An empty fuel tank. And it passed.
- The Chevrolet Cavalier (badged and sold as a Toyota in Japan) raced in the GT300 class in the JGTC in the late 90's.
- The Porsche 911 was supposed to be named the '901', yet Peugeot had a licencing agreement for naming cars with three digits and an '0' in the middle.
- The multifunction dash display in R34 Skyline GT-Rs had a subscription-based TV tuner pre-installed. Driving above 5 km/h, the image disappears yet the audio still plays through the speakers.
- Wiesmann's logo is a gecko, apparently to show how their cars stick to the road like a gecko sticks to a wall.
- Mitsubishi used the Lancer Evolution IIIs AWD system, engine and transmission as a basis for the HyperGear Sports R, a sports variant of the Mitsubishi RVR, otherwise known as an Eagle Summit.
- The Californian-spec 1980 Corvette had a 305 ci. V8, pushing out a mere 180 HP and was mated to a 3-speed automatic transmission.
- The Lada Niva (or 4x4 as it's officially marketed) started production in 1977 and, in one form or another, has remained in production ever since.
- The Vector M12 uses turn signals from a first gen Mazda Miata/MX-5.
- The transmission in a Mercedes-Benz SLS is the exact same as the Ferrari California's.
- In order for the Peugeot 206 to be viable for rallying, the overall length needed to be increased. The result was simply adding extended front and rear bumpers to a regular 206 and selling it as a 'GT' model.
- All Aston Martin models since the DB9 have a pen mounted in the dashboard. Also, the crystal key fob is referred to as an 'Emotion Control Unit' by Aston themselves.