18-03-2020, 08:32 PM
My RP saloon, admittedly with the 4 speed 'crash' box, which has a lower third gear ration than the synchromesh box (1.74 to 1 as opposed to 1.66 to 1 for the later box) has been timed (by a friend in their Porsche Boxter) at 51.6 mph 'flat out' On 3.50 X 19 wheels, this equates to 3500 rpm. The same revs in third, gives a theoretical maximum in third of 29.64 mph and a tad over 31 mph with the synchro box. However, taking the car to that speed in third, it gets awfully busy mechanically, and I am usually in top well before 25.
35 mph in third therefore sound a touch optimistic to me, unless the speedo on the test car was a bit 'fast'.
35 mph in third therefore sound a touch optimistic to me, unless the speedo on the test car was a bit 'fast'.