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There are small differences mainly due to tyres, but the 3,000 and 4,500 revs for 80 and 120 m/h are close enough. The only IRS that leaps to mind with a diff lower (numerically larger) than 3.77 was the 2.8 XJ6, which I doubt ever reached SA. A ratio of 3.77 is already a bit performance oriented; lower than that seems very odd with a 3.8 or 4.2 engine. There's certainly something non-standard in your friend's car.
Sorry for the mess up Peter. Seems I have experienced the wrong car. Please accept my apologies.
This is a standard S Type ~ 1972 Service Manual. Where my 4617RPM comes from. The 2.8 XJ6, was built briefly in SA and a total flop. Everybody wanted a 4.2 here especially at altitude on our highveld.
Last edited by Glyn M Ruck; Dec 16, 2023 at 11:45 AM.
The 1972 Service Manual Covers both gearboxes. We started building the S Type in January 1966. My car was No 4 off the production line at CDA. Somehow it was registered before it was built which is why I call it a 1965 model. A matter that I have never been able to resolve. No Moss boxes were fitted to SA production.
Last edited by Glyn M Ruck; Dec 16, 2023 at 12:31 PM.
You can drive a Mk2 without exceeding 3,000 revs. It feels like a nice, reasonably sophisticated, old classic car and you'll never imagine it's other side. Push it above 3,000 revs, and everything changes, it becomes the powerful, road burning sports saloon that made it special in its day.
This is precisely what my intention is, once I get the fuel issues sorted with mine...
...I know it's in there, but it just ain't the time to ask this of the car.
I have an expansion tank under the front left fender. My battery is there too (which means taking the wheel off to access the battery, but I have an isolator under the front bumper just in case something bad happens and I would have otherwise taken a battery lead off.
Reading some of the posts. perhaps I am one of the lucky few with a clock that works and whose tachos and speedos dont wiggle or wildly oscillate! Smooth as silk. Speedo not accurate cos 14" wheels, dunno what diff has been put in it.
Reading some of the posts. perhaps I am one of the lucky few with a clock that works and whose tachos and speedos dont wiggle or wildly oscillate! Smooth as silk. Speedo not accurate cos 14" wheels, dunno what diff has been put in it.
Same here, and is why I'm quoting speeds + rpm...there's some numbers written on the diff cover in yellow paint, but I don't recall what it says - for all I know I might have a non-std. diff in there.
