Originally Posted by a1fa
What do you mean? They don't make gasoline hybrid trains.
I mean the frequent on/off duty cycle of the engine in the environments in which the volt shines really aren't the best venue for a diesel. Diesels (almost all of which are turbocharged in modern automotive applications) do best when started and run through complete warm up and cool down cycles. Frequent start/stop operations aren't as good for a turbo diesel. A normally aspirated gasoline engine isn't nearly as adversely affected by this operation, and tends to warm up faster than a comparably performing diesel.