Thanks all for all the interesting advice on the best way to proceed. I think all things considered, it is best I stick to the V8 engine I have got as: it's going to be expensive swapping it for a smaller sized engine, for not much gain in terms of fuel efficiency, and I also like that it is...

Thanks Marmaduke. There's a whole bunch being sold on eBay, the question is whether sellers can be trusted and the quality of the engine supplied.

Hello, I am on the market for a second hand defender engine and wonder if anyone can help. I would like to size down from my current defender V8 3.5 petrol engine to an engine that's more frugal with its fuel consumption. Does anyone know or can anyone advice where I can buy a second hand land...