It looks as though it may be a manufacturer's 'mule', a crude construction made specifically to test component/s, engine, suspension, brakes, etc. This one looks a if it may have front-wheel-drive and independent rear suspension, but despite a lengthy inspection of the photo, I can't work out which manufacturer would have built it. The air filter housing, though, looks a bit BMC-ish......
The bloke driving, however, looks very familiar and of course I'll know who he is the second I read the correct answer.
![Huh ???](https://www.autopuzzles.com/forum/Smileys/default/huh.gif)