Discussion
Basically, All GT's were Manuals, most S4's were Auto's. If there is a premium on a GT as opposed to an S4 Auto, it may not be there on an S4 Manual.
Also... all GT's have "sports" suspension as standard, electronic LSD, and most have 2 way electic sports seats instead of multiway.
GTS's are still considerably more expensive, and are slightly newer, wider, heavier (slightly), and with a few more BHP and a bit more torque.
For more info have a look at www.928.org.uk
Or a posting here about my first experiences with a GT:
http://pistonheads.com/gassing/topic.asp?t=94271&f=48&h=0
Also... all GT's have "sports" suspension as standard, electronic LSD, and most have 2 way electic sports seats instead of multiway.
GTS's are still considerably more expensive, and are slightly newer, wider, heavier (slightly), and with a few more BHP and a bit more torque.
For more info have a look at www.928.org.uk
Or a posting here about my first experiences with a GT:
http://pistonheads.com/gassing/topic.asp?t=94271&f=48&h=0
Used to own a 928GT a good few years back, great beast of a car, much more of a drivers car than the standard S4. The gear box is a bit clunky & it has a dog leg first gear, but in combination with the uprated suspension & engine a manual box with well spaced ratio's adds much greater control & much more real world grunt.
If it was my money I would stretch that little bit further & buy a manual GTS the last of the breed was by far the best of the 928's & one seriously quick Porker, despite it's size & weight it was even fast through the twisty stuff.
If it was my money I would stretch that little bit further & buy a manual GTS the last of the breed was by far the best of the 928's & one seriously quick Porker, despite it's size & weight it was even fast through the twisty stuff.
funbobby said:
are there any differences interior wise?
Many later cars ('91) came with the airbag wheel/dashboard that is slightly less horrid than the previous one.
These cars usually feature the GTS gearstick that is more comfortable to play with.
On cars with the dual air con there are vents on the rear center 'elbow rest' (or whatever it's called).
Later cars have round speakers outside the door trim while earlier ones have speakers inside (little holes in the trim).
I've owned a 928 GT and a 928 S4 manual.
I personally prefer the S4 Manual. Given, my manual has a tailor made rear box. The GT has slightly wilder cams and a remapped ECU but it only gives a marginal 10 Bhp more over the S4 and loses out on quite a bit of low speed grunt.
The other thing worth mentioning is that my early S4 does not have a catalyst-which makes a huge difference to fuel economy and a slight difference to performance, although never officially seen in the Porsche homologation figures. The reason it makes a huge difference to fuel economy is because a Cat car must run at stoichiometric Fuel air ratio of 14.7:1 where as my non cat car runs closer to 17:1 at light loads. I can easily achieve 30 mpg and above at light legal limit long distance motor way runs-although alot of this is down to the higher rear diff ratio (2.63 vs 2.73) which pulls 28mph/1000 rpm. My GT would struggle to better 24 mpg on any long distance cruise. These are the figures that the automotive industry had to keep quiet for obvious reasons.
An old Catalytic converter system that needs attention will costs lots of money and if Lambda sensors go the engine won't run right. All GTs have catalytic converters.
In terms of performance contemporary road tests show there's very little in it. A good S4 manual can match or even better a GT and a good GT will trounce an ordinary S4. Road And track magazine achieved 0-60 in 5.5 secs for a manual S4 and similar figures have been achieved for GTs.
In terms of handling the GT suspension is nicely firm and this is good in high speed transient manouvers and slaloms, but in terms of ultimate cornering G there's very little in it. Its down to personal preference, Its interesting to note that the 5.4 litre GTS went back to the slightly softer S4 like set up again.
The GTS is a wonderous car, but the engine is harsher then either the 4.7 litre 310 Bhp 2 valve or any of the 5 litres due to the longer stroke. Porsche tried to rectify this, by adding a fully counterweighted crankshaft but it still couldn't match the earlier units for aural delight! There are also alot of issues with the piston ring packs on older GTS models and oil burning.
So IMO it's not worth paying the extra premium for a GT, go for an early non catalyst well looked after S4 Manual!
I personally prefer the S4 Manual. Given, my manual has a tailor made rear box. The GT has slightly wilder cams and a remapped ECU but it only gives a marginal 10 Bhp more over the S4 and loses out on quite a bit of low speed grunt.
The other thing worth mentioning is that my early S4 does not have a catalyst-which makes a huge difference to fuel economy and a slight difference to performance, although never officially seen in the Porsche homologation figures. The reason it makes a huge difference to fuel economy is because a Cat car must run at stoichiometric Fuel air ratio of 14.7:1 where as my non cat car runs closer to 17:1 at light loads. I can easily achieve 30 mpg and above at light legal limit long distance motor way runs-although alot of this is down to the higher rear diff ratio (2.63 vs 2.73) which pulls 28mph/1000 rpm. My GT would struggle to better 24 mpg on any long distance cruise. These are the figures that the automotive industry had to keep quiet for obvious reasons.
An old Catalytic converter system that needs attention will costs lots of money and if Lambda sensors go the engine won't run right. All GTs have catalytic converters.
In terms of performance contemporary road tests show there's very little in it. A good S4 manual can match or even better a GT and a good GT will trounce an ordinary S4. Road And track magazine achieved 0-60 in 5.5 secs for a manual S4 and similar figures have been achieved for GTs.
In terms of handling the GT suspension is nicely firm and this is good in high speed transient manouvers and slaloms, but in terms of ultimate cornering G there's very little in it. Its down to personal preference, Its interesting to note that the 5.4 litre GTS went back to the slightly softer S4 like set up again.
The GTS is a wonderous car, but the engine is harsher then either the 4.7 litre 310 Bhp 2 valve or any of the 5 litres due to the longer stroke. Porsche tried to rectify this, by adding a fully counterweighted crankshaft but it still couldn't match the earlier units for aural delight! There are also alot of issues with the piston ring packs on older GTS models and oil burning.
So IMO it's not worth paying the extra premium for a GT, go for an early non catalyst well looked after S4 Manual!
Funbobby:Porsche offered Catalysts as a no cost option in either 1987-1988 onwards,So some could have them and some could not, its easy to check for them however by looking underneath, the non cat cars simply have a conventional silencer underneath the front seat region.
I believe they started fitting them as standard from 1990-1991 onwards but am not sure.
I'm considering selling my car, BUT, I'm reluctant at the same time! It all depends on an insurance quote I get for a 993 Turbo and if I can get a good lock up. I'm just spending close to a grand on my 928 on lots of things and I love it alot. Decisions decisions! *L*
I believe they started fitting them as standard from 1990-1991 onwards but am not sure.
I'm considering selling my car, BUT, I'm reluctant at the same time! It all depends on an insurance quote I get for a 993 Turbo and if I can get a good lock up. I'm just spending close to a grand on my 928 on lots of things and I love it alot. Decisions decisions! *L*
Yes it's possible as I believe the ECU can be connected differently but the ECU is common, however, you would have to disable the Lambda sensors which monitor the exhaust oxygen content and make sure the car no longer runs in closed loop fueling mode.
Also beware that if you did this and didn't remove the cats and got the fueling on the lean side at FULL load you could potentially burn out the catalysts! The other point is that if your car is a post 1991 and you DID remove the cats-it would not pass the MOT over in the UK...
Also beware that if you did this and didn't remove the cats and got the fueling on the lean side at FULL load you could potentially burn out the catalysts! The other point is that if your car is a post 1991 and you DID remove the cats-it would not pass the MOT over in the UK...
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