Is it a bike, or is it a car? - Dynamic Dave
Both actually:-

www.naro.co.uk

It reminds me of one of those Dutch contraptions they showed on Top Gear once.

Personally I wouldn't be seen dead in one.
Is it a bike, or is it a car? - cheddar
Not sure that I am Naro minded.
Is it a bike, or is it a car? - Dwight Van Driver
A car DD? Surely not

Motor cycle:

mechanically propelled vehicle, not being an invalid carriage, WITH LESS THAN FOUR WHEELS and the weight unladen does not exceed 410 kgs.
(MV [Con and Use] Regs.)

How mant wheels has it?

dvd

Is it a bike, or is it a car? - pmh
It appears to have 4 wheels, hence not a motorbike on your definition?

Once upon a time I thought that the motorbike definition had something about no reverse gear. Or am I mistaken? I think I remember some 3 wheel cars that could have reverse gear disabled to allow them to be driven on a motorcycle licence.
--

pmh (was peter)


Is it a bike, or is it a car? - Tomo
"Personally I wouldn't be seen dead in one."

Nor I! The only sure way to achieve this will be not to get in. What happens when it skids I hate to think about

By the way, 20hp from 400cc is about the specific output of bog standard motor cycles of say 55 years ago. They could get this from a diesel and have real economy.
Is it a bike, or is it a car? - BobbyG
If it is wide enough to be stable enough for 4 wheels, then I think it would be too wide for nipping between cars in traffic queues and thus defeat the whole purpose!