Bajaj RE60 Quadricycle Or A Car?
Bajaj RE60 will be launched with great mileage promise: 35 kmpl. The RE60 is powered by a 200cc petrol engine and has top speed of 70 kmph. Note that Tata Nano, the small car, was launched with a promise of about ~25kmpl (23.6 kmpl, to be precise) and we're yet to know of a Nano that's even crossed 20kmpl.

What I'm wondering is the actual difference between a quadricycle and a small car. RE60 has an engine, a drive-drain and it looks like a car. I wonder what makes BAL (Bajaj Auto Limited) call it a quadricycle and not a car.
The Mechanical / Automobile engineers here may throw some light on it.