I bought a base (2.0l) Cayman off the dealer's lot and considered this question after the fact wondering if I'd done the right thing. My conclusion was that I had made the right choice. Here are some of my thoughts, some less important than others, some possibly just rationalizations:
The S model is marginally heavier though probably not enough to notice. Some of that will be from other hardware, I suspect. The S has other features that I really don't need, would rather not have. On the other hand, my car has the 20" wheels...
At the EPA mileage estimates (which I have found to be reasonably accurate in my usage), the difference in price is enough to pay for all the gas you will use through at least half and maybe even all the life of the car. The gas savings from the higher gas mileage contributes even more.
At the EPA mileage estimates, the 16gal tank on the S has a similar single-tank range as the 14gal tank on the base model.
In theory, in the smaller engine there should be lighter loads on the main, con rod, and wrist pin bearings, and therefore possibly longer life. Of course if Porsche engineers compensated by using smaller bearings, this point doesn't hold. You'd have to ask a mechanic about this, and I suspect the engines haven't been out long enough for any real data to exist.
In theory the smaller engine might be able to rev more easily. Of course that's just a traditional argument that may not apply at all in practice.
You (or at least I) would have a hard time telling the difference between the two engines in normal use. Personally I have almost no opportunity to exercise mine to its fullest "potential" and when I do it wouldn't matter doodleysquat whether I had the extra oomph or not. It gets going real fast real fast.
Other folks will have different opinions, of course. If I had bought the S model I would not be able to justify it. Some would say I can't justify having bought a 718 Cayman at all, but that's a different discussion!
Again , the Cayman T is starting to look more and more what I wantIt's a shame @ZuffenHouseRules has recently jumped ship to a 99x; he is (er, was) the resident engine guru around here. His focus is the 2.5, but he knows enough about the shared architecture between the 2.0 and the 2.5 -- and the 991.2, for that matter; the 718 engine is essentially 2/3 of a current 911 engine -- to provide some insight.
I have a 2.0. It is stupid fast, particularly when the car is already in motion. IMHO, the 2.5's advantages in power and (only slightly) torque can only be exploited on a track by a very skilled driver. Unless you're going to track the car regularly, the 9k-plus premium for an S over the base model is better spent on:
- Sport Chrono (if you're getting a PDK)
- PASM
- PDLS+ headlights
- possibly PTV (this is debatable; I did without)
- Driving lessons
- Taking the S.O. who allowed you to buy your car out on dates regularly
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Call me a weirdo, but that gray tach is really super-irksome to me. You can't even option in the black tach that both the base and GTS have! For all the customizability that Porsche offers, it is really a glaring oversight.Cost, oval tailpipe and not getting the weird grey tachometer dial was my main motivations for ordering the base 2.0 over an S 2.5.
I also have the theory that getting the less powerful engine will be more fun for road use, as I will get to use a higher percentage of the power of the engine.
And if you compare the 2.0 and 2.5 based on specific power output, the 2.0 is clearly the better engine>
Which engine is the best for you will of course depend on how you will use the car.
Glad to offer my experiences. Correct me if I"m wrong, but not counting the T which seems essentially a base model with some special stuff added so you don't have to order it, the only way to go from the 2.0L to the 2.5L is to go with an S (or GTS). Hence the base to S comparison.This is good , I was more asking engine vs engine comparison and not a base vs S .