A roadster is an open (without a fixed roof or side weather protection) two-seat car with emphasis on sporty handling. While roadsters usually have soft-tops, retractable hard-tops are becoming more common.[1]
XKR is not a roadster... It's a 2+2 seater. But I get what you mean... yet, even so, bring on the XFR-S, it'll be the same outcome! Same V8 powerplant and essence!