Bmw had prototypes of the I series city car and roadster on prominent display in geneva .
宝马在日内瓦展示了其i系的原型车同时还有超级跑车。
Specialist vehicles such as the 200 kph ( 125 mph ) tesla roadster are even more expensive .
而特种车辆，例如时速200公里（125英里）的特斯拉敞篷跑车则更为昂贵。
By contrast , the tesla roadster uses just one gear-such is the flexibility of its three-phase induction motor .
相形之下，泰斯拉跑车仅仅使用单个齿轮这要归功于它的三相感应发动机。
Saic 's debut model , the two-seater mg tf roadster , is expected to be delivered to uk showrooms in september .
上汽集团的首款mg车型是两座mgtf跑车，预计今年9月会出现在英国的展厅。
Bmw is also planning to expand its conventional business , adding more small cars to its namesake brand and expanding the mini line with at least a roadster and coupe .
