top speeds I'v done are-:
BMW 330d M - 175 - Negombo road
Renault Laguna - 160 - Baseline road
Jaguar X-type - 192 - Hambantota
07' Honda Civic Type-S - 160 can't remember the name of the road, on the way to Ratmalana from Kiribathgoda , its an awesome road
Mazda 3 - 140 - Negombo road