Rover P3 axle ratios.

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Peteat
Posts: 2
Joined: Sat Sep 21, 2019 7:14 pm

Rover P3 axle ratios.

Post by Peteat » Sun Sep 22, 2019 2:21 pm

Hello I am a new member.
I have 1948 Rover P3 75. I will be using the car to do some continental touring and would like to increase the axle ratio. I do not want to fit an overdrive as I like using the freewheel to enable clutch-less gear changing ( faulty knee ). Could anyone suggest a suitable axle ratio and from which models to obtain a diff from.
Thanks
Peter

GOY189
Posts: 415
Joined: Sun Oct 19, 2008 5:08 pm

Re: Rover P3 axle ratios.

Post by GOY189 » Mon Sep 23, 2019 4:15 pm

Helo Peter,

The standard P3 diff ratio is 4.7:1. In theory any Rover diff from P4s or P5s will fit. Although P5 auto or P5B/Land over 3.54 :1 diffs can be fitted, 0-60 time certainly isn't quick! and hill climbing ability may be compromised. The other 2 ratios are 4.3:1 or 3.9:1 both from P4s or P5s.

Hope this helps
Mike Maher
Chairman

Peteat
Posts: 2
Joined: Sat Sep 21, 2019 7:14 pm

Re: Rover P3 axle ratios.

Post by Peteat » Wed Sep 25, 2019 4:36 pm

Thanks.
Peter Tinsley

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