Porsche Engine Replacement - How much of price Premium?

Simple question really.. For the 3.6 cars...how much of a premium would you expect to pay (if anything) for a car with a replacement engine from Porsche? I side by side comparison with a similar age and spec car, OPC history with the original engine at say 80k. 10%, 20% or more or none at all ??

The general consensus is that the M96 engine can score its bores at pretty much any point in its working life therefore I wouldn't pay any premium for a car that has had it's engine replaced "like for like".

For me - none.

What about cars with an upgraded engine from someone like Hartech? Would they command a premium over a Porsche-supplied replacement?

Funny that with a 'classic' Porsche people would pay less for a non-matching engine number car.......

A Hartech car 10-20% more A like for like, maybe a bit more - what are the odds of 2 engines blowing up in the same car?

Statistically exactly the same. It's like saying "the coin landed heads-up, so next time tails is more likely". In fact, each toss is equally likely to be heads or tails. Your new original engine with the same inherant faults is as likely to fail as your first one. That was my reason for asking about the rebuilt engines with the weak areas upgraded, over a Porsche replacement engine. [ ]

Lol thanks for the maths class I was a derivatives trader in a previous life. It was tongue in cheek hence the no real premium attached but at least you're getting a reconditioned engine and ancillaries rather than one with wear and tear.

Just to play the devil's advocate, I wouldn't say it is the same thing at all. The chances of a coin landing one way up are 50:50 (almost - it can land on its edge). The chances of an engine going bang are (by various uncorroborated estimates) 1:20. The chances of getting two heads in a row are vastly different from getting two blown engines in a row.

Does anyone know whether the new short engines from Porsche (already out of stock,I believe) incorporate production improvements of the later engines?

What Paul is saying is whether the engine is replaced or not the odds are still 1:20 of it blowing up - the new engine is just as reliable and the new engine doesn't know or care what happened to the old engine it's still got a 1:20 chance of blowing up ie nothing's changed. The only advantage in my view are the new ancillaries and the engine being nice and fresh (still with a 1:20 chance of blowing though, but less prone to wear and tear failures like chains etc)

Exactly. That's why my mention that engines with some of the aftermarket improvements would be worth a premium, a Porsche replacement less so. [ ]

I think they did. When I had a new engine in my 996 3.6 the suggestion was that basically this was exactly the same as what was being put into brand new (at the time) 997s with RMS version 87 etc. Am sure there were some minor changes at least. It's still a relatively rare occurrence - for years I was the only PCGB forum user that had the dreaded complete destruction of an engine and I've never heard of anyone being as unlucky a second time with a replacement Porsche engine (which came with 2 year unlimited mileage guarantee). The replacement didn't come with any Hartech style upgrades or lower temperature thermostats though. For me, it's once bitten twice shy and I simply wouldn't buy a car with that engine again or the 3.8 Carrera S engine but I accept that is not a statistically sound thought process. I deliberately changed out of my 996 once the replacement engine warranty ran out - but I'm not bitter...

That is my understanding too, but also that it had the latest larger diameter IMS bearing.

I thought so.

Maybe thee is a statistician on here who can confirm this. The chances of tossing two heads in a row are one in four. The chances of blowing two engines in a row are one in 400. Am I correct?

i just bought the car £13k porsche bill in 2011 for the engine 25 k ago serviced every year from 2003 to now at Swindon OPC 1000's spent at the OPC every year very happy

If a car has not had an engine blow yet then yes the probability of it blowing twice is 0.05x0.05. In this instance however the car's engine has already blown, so we're replacing probability with fact. We now start afresh. The new engine has a probability of 0.05 of blowing up regardless of what happened before.

Oh OK. So the car is the one that would be 20 times more unlucky, not the new owner. So what are the odds of two consecutive owners being unlucky? [ ]