it's possible it's not a single piston. i didn't read the article, just saw 623cc. lot of motorcycle engines out there with v-twins down to 500cc (maybe smaller, just 500cc is the smallest I know of)
I like it. You have to remember India has a completely different market than here. honestly i would rater see these over in the us than SUVs. 50mpg is a little disappointing for that i think. The car doesnt need power steering. I read that it weighted 1300lbs.