Talk Morgan Forums Morgan Sports Cars Classic Morgans (pre-CX) Changing final ratio of the rear axle

2005 PLUS 4 with 3.73:1, Ford gearbox,
130 km/h (80 mph) at 3200 rpm, 74 BHP at 49% of the rpm maximun.
25.10 mph at 1000 rpm. You can find it in the handbook.


For the same speed 80 mph, with 4.33:1 rear axle, you get 89 BHP at 3700 rpm,
plus 15 BHP available with the same motor and at 57% of the rpm maximun.