Here is one reason:
MINI Cooper D (yes, that's Diesel) 80 mpg highway, 60 mpg city!. 1.6L/ 110hp. Topspeed 121 mph.
1 million MINI's sold in 6 years. Owned by BMW.
The Toyota Prius doesn't even come close. Anything that Detroit builds is, well, euhh, far behind.
Quality, what's that? Do a search on carcomplaints.com. Do a search on Chrysler. Their 2.7L V6 has a terrible history of seizing up after 60.000 miles. Electrical problems, where to start?
Consumer Report has interesting reports on quality. New and used. The big 3 are all in the bottom of the rankings.
If I buy a car I want something reliable for the $30-50.000 they cost nowaday, not something that gives me a hatefull intimate relationship with a dealer or manufacturer that gives me the run-around.
Example: my wife's Chrysler Sebring Convertable: 6 years old, 6ok miles, 8 major service issues (and a few little ones), all quality related: poor materials, bad design.
My old Toyota, 220k miles: Air flow meter failed at 190k. Only problem I've ever had.
Never ever a Chrysler product again, same goes for Ford and (US) GM. I know I'm not the only one.....