V8 Conversions |
by Mike Jeffreys (UK) | |
Above all else, the Rover V8 engine is of American origin! It first saw the light of day in an early 1960's Buick.
The rights to build the engine were snapped up by Rover in the mid 1960's
(after Buick stopped making them!) and the first car to use the engine was the Rover P5B. The P5B was the sort of car used by Prime Ministers (the Queen also had one). |
Related Topics: V8 3.5 engine |
The British Leyland cars to use the V8 were, in roughly date order, with approximate figures: |
Vehicle | Engine size (cc) | CR | Power (bhp) | Notes |
Rover P5B | 3500 | 10.5:1 | 180 | First use by Rover, used 100 octane |
Range Rover | 3500 | 8.5:1 | 130 | Tuned for torque |
MGB V8 | 3500 | 8.5:1 | 135 | Shoehorned in! |
Rover P6 | 3500 | 10.5:1 | 170 | Same as P5 spec |
Rover SD1 | 3500 | 9.5:1 | 155 | Engine block strengthened, bigger valves and ports |
Triumph TR8 | 3500 | 8.5:1 | 135 | First injected version |
Rover SD1 Vitesse | 3500 | 9.5:1 | 190 | UK spec. of TR8 injection, new block |
Range Rover 3.9 | 3900 | 9.0:1 | 190 | Larger pistons, new block, new injection control |
MGR V8 | 3900 | 9.5:1 | 190 | Used the RR version |
Range Rover 4.2 | 4200 | 9.0:1 | 220 | New crankshaft |
Range Rover 4.5 | 4500 | 9.0:1 | 240 | New crankshaft? |
In 1971(?), the Range Rover was born. Let's face it, if the V8 can move this lump to 105mph, it should be OK for our TR7s! The engine generally remained unchanged (barring CR differences) until about 1988, when Rover created the 3.9 litre version. This block was stronger, and so allowed the bore to be increased. In the early 1990's Rover started to try increasing the stroke and eventually got to 4.5 litres. Whilst the new Range Rover (pictured) now uses a completely revamped V8, I believe that the Range Rover Discovery still uses the old 3.9 litre. So OEM engines should be available for at least another couple of years. |
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V8 FAQ? Question: Why wasn't the V8 engine put in the TR7 sooner? Answer: Supply problems, the SD1 took them all. Note that the engine bay was designed for a V8. Question: Why was the TR8 never available in the UK? Answer: The TR7/8 was scrapped just before release. Question: Is the V8 used elsewhere? Answer: Lots of UK 'kit car manufacturers' such as TVR, Morgan, Marcos use the 3.9 litre (sorry guys :-). TVR have taken the V8 to 5 litres, just give them the money and your TR7 will annoy any TVR. Question: Why not just fit a Sprint engine? Answer: The V8 is readily available in the UK, and it is, in general, more reliable. The V8 can be extended to over 300 bhp. | |
Find your engine. In the UK, it is possible to find a V8 in almost every scrap yard! These days, they are always the SD1 item. It is possible to find a running SD1 Vitesse for about 300 pounds sterling. Also, Rimmers Bros UK (supplier) will supply a brand new 3.5, 3.9 litre or 4.6 full engine. They also have a wide selection of parts and components that will give you an increase in horsepower, whilst still allowing the car to be driveable and reliable. In the US, you could probably find one of the 2000 or so imported SD1s being scrapped (perhaps a crashed Range Rover?), otherwise you may have to import. You could also try RoverWeb for more Range Rover information. |
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Converting a TR7 to TR8 specifications. First of all, let's assume you have bought the Rimmer kit after viewing the details in their free catalogue and let's assume you have the 5 speed gearbox and axle pairing in your TR7 :-). In the Rimmer kit, you would have received the following:
To be continued......... |
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