The Bond D is a brilliant little car. It's got the style of the C, but vastly improved mechanics: 12volts, Siba dynastart, 4 gears, stronger rear syspension, you can fit a 250cc top end on a D motor, but not a C. I own a D 2-seater and it's totally reliable, comfy and will maintain about 50mph ( it's got the 250cc conversion ). I love it.