Peugeotech's 505 V8 build (Rover 4.6L)

3 minute(s) of a 64 minute read

Yep. My mate and I have been developing theories and engines on the Rover 3.5 to 4.6 and we have got a very grunty 4.6 unit running at the moment in his race car. 6000rpm in 4th (1:1) gives us 140 mph in a stripped down (1000kg) P6 Rover. We're using a solid flat tappet , points and a 650 Holley. . Standard valve sizes and some really simple exhaust work. Ports are hand done on the carb engine but on mine, which is one of the very last Rover V8's will get exhaust ports massaged but the inlets will stay as they are.

I'm running a close grind to a Chevy 327 factory 3863151 which was a 300hp in a 327 sbc. The engine will have 11:1 and engine management which I intend to set up myself. I had it custom made by an ECU supplier for the Rover sensors. I'm using a Thor engine manifolds, 4 bolt 4.6 liter and a BW 65 auto which I've reworked to bolt up to the torque tube. Call it far fetched but it is really looking good. I'm aiming for a tyre frying, discrete and light, 505 sedan.

So far I have front slotted rotors from a 604 and will run 4 spot RX7 front calipers, 3.08 a 3.3 and a 3.46 diff to get maximum flexibility once it's all set up. No matter what, as most 505 owners realise the last series 505 sedans are such a beautiful drive so I'm really happy to be getting into this idea. The engine weighs the same as the old XN1 engine ( before a/c, p/s etc) and certainly lighter than the Diesel so, it sort of makes sense to try this. A chap over here has a 504 fitted with the Australian Leyland version of this engine at 4.4l and BA10/5 . Negligible change in balance, in fact he reckons it's made the car.