Looks like the difference in weight is about 50kg in the 147GTA's favour.
However that weight is probably with the 147GTA's std cloth interior, the weight difference would be less once it gets the optional leather seats. No lighter cloth option for the 156GTA.
So well under 50kg difference.
And the 156GTA is probably more aerodynamic at higher speeds.
But both are probably limited to 155mph anyway, so it makes no difference.
The GT 3.2V6 comes up as the same weight as a 156GTA
147 is defintely quicker to 60 in any test I have seen.
..but I have seen several German tests of 0-100 for the GTA with a time of 14s, exactly the same as the 147 GTA (98 octane petrol), so I guess the saloon gradually catches up.
Autocar did only get 15s for the 156, but with using some environmentally friendly fuel (bah phooey!).
After 100mph in my totally non biased opinion (of course) I would expect the saloon to slowly waltz away from the less sleek hatchback since wind resistance is hugely important above 100mph
The speedo only going up to 180mph in the 147 GTA - didn't know that! That would be inconvenient.
If we're talking about top speed, no, they are not limited to 250km/h. Only the 156 GTA reaches 250km/h due to it's better aerodynamic shape. It is well know that sedans are generaly more aerodynamic than hatches.
As for the GT, it has a pretty Cx or something, otherwise it's hard to explain the lower performance figures, and I mean both acceleration and top speed.
But regarding top speed, who cares ? The 147 GTA reaches 246km/h, the 156 GTA reaches 250km/h, it's only 4km/h, and that is in theory.
PS. The speedo is the same for the european versions, 300km/h. Pretty high for a car that won't even reach 270km/h, but it's nice anyway.
since we are talking speeds, you guys with oem 156 gta cars, have you tried to reach the limit? if so is it only my car that simply stops @ 210km/h and then it takes like 5weeks untill you reach the rest, if even that...
the car blows away to 210km/h without any problems but after that its dead, i dont even have a memory of reaching speeds higher than that with my GTA, while my old 2,5 v6 i went to 235kmh according to the meter, without problems.
Doesn't sound right to me, sure things slow down a lot in 6th for a standard car, but you should still be motoring reasonably well throughout 5th gear, obviously slower than 4th though.
At that speed though any inclines or wind can slow things down a suprising amount.
You don't really feel a strong push in the back like you do for 4th though, just more like steady indicated speed progress - every mph more consumes a lot more energy than at lower speeds due to the wind resistance.
Am sure some of our derestricted autobahn specialists can give their opinion.
Just a thought, maybe try high octane next time you plan such an assault on a derestricted area.
It's aerodynamics, as has been stated. I think I'm right in saying that the 156SW is actually the GTA that is most slippery through the air, bizarrely!
I've never maxed mine, since I tend to do such things abroad and the French have caught our sense of humour failure about speeding (not been to Germany in the GTA), but I can report that mine pulls very strongly at 130mph and more, even in 6th. Suprisingly, and rather pleasingly, strongly.... I have been quite a bit quicker than that once but was not paying that much attention to the speedo, more to the scooby that I was cruising steadily up behind, then past - he was at his vmax, I would guess...
i think mine as some kind of fault on 5th cause it really just stops @ 210kmh nothing happens on 5th gear havent tried 6th that much but if i remember right its the same. might be something wrong with it il take her out now for a test, so i wont think about it all night.