The Smart ForTwo is a tiny two-seater four feet shorter than a Mini Cooper. Sold in Canada, but not the U.S., it doesn't feel as tiny and vulnerable as its tall stance makes it appear. With a 40-hp, 0.8-liter, three-cylinder, turbocharged diesel engine and a six-speed sequential transmission, its 23.2 second 0-60 mph acceleration time is the slowest of any current production vehicle we've tested. The car quickly loses speed when climbing hills. The disturbingly slow shifts cause it to lurch and lose significant speed. Handling is reluctant, steering is vague, and the ride is jittery. At 43 mpg overall, it goes one mile less on a gallon of fuel than a Toyota Prius.