Top 10 10 Of The Slowest Sport Cars by Frédérick Boucher-Gaulin July 12, 2015 Photo: Mazda3 : The RX-7 never was a straight-line car, but the 1978 model took 9 seconds to get from a standstill to 100 km/h... slow by any standards. « PreviousNext » Share on Facebook Share: