The cessna p210 with the turbine is a conversion of older 210's with the piston engine and replacing it with a RR turbine. They are really cool airplane, cruise at over 200kts, known ice too.
I went it one in Ireland only for a short spin, the guy landed it on a 410 x 10m strip. There has only been about 60-70 of these aircraft built. They are unique there is nothing on the market that can match their performance in speed and short field ability and fuel consumption. have a look at
www.onaircraft.com