[Day971]

Hi all, apart from the dial face, what do i need to change to make the car read and record mph not kph. 416 sli. Thanks

[lsowden12]

Speaking as someone who has no idea about how it works in Rover terms but in my previous car it was as simple as literally just changing the dial face and nothing else because they were interchangable as they were set so that the needle always showed the converted amount by changing where the speeds were on the speedo face to account for the conversion.

It could literally be as simple as putting them both side by side and checking that the 30mph is in around same place/angle on the dial as 50kph then working up from there. If it seems about right then it probably will be. If not then it can't be an incredibly difficult fix. Good luck!

[Roverlike]

Yes, but what about odometer? It will still measuring km not miles.

[lsowden12]

Sure, but I would have assumed by “kph” and “mph” it’s not in reference to the odometer as they’re measurements of speed

That being said whilst it definitely would be possible to convert the odometer from km to miles, it would theoretically be quite a large job which isn’t guaranteed to carry over your old genuine mileage and isn’t entirely necessary anyway because you can list your mileage in kilometres on your MOT certificate and convert it pretty easily anyway. Depends how committed you are I guess

[Day971]

I have heard there is some kind of small gearbox you fit to one end of the speedo cable

[crepello]

Probably less hassle to get an MPH instrument cluster from a breaker?

[Day971]

Not sure if the odometer is controlled by the instrument cluster or by the take off point on the gearbox

[richard moss]

It's as simple as "change the cluster" but try to get one from a model with the same engine/gearbox combo. In fact, if memory serves me right, you can just fit a replacement Speedo into your existing cluster.

I had a 1994 manual 414 which was ex-Saudi Arabia and had been produced with a kph speed which includes the km odometer. The owner had brought it to the UK and fitted an mph Speedo but kept the old kmh one which I refitted when we moved to Spain.

Either way, it's a simple swap and everything required is in the Speedo head

[Day971]

Thanks for that Richard, will start searching for a speedo