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(Post Link) post #1 of 17 Old 18-01-09 Thread Starter
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hypothetical comparison

Hiya guys, gonna be buying GTV real soon and i'm opting for the 3.0l V6, but out of interest i have some thoughts.

Which is faster, A 2.0l Turbo chipped with better intake and exhaust, or a 3.0l with a remap better intake and exhaust?

How would they compare 0-60? 0-100?

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PS, any good Cams that can be fitted to the 3 litre engine without a huge hassle that will help it move its weight?
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Re: hypothetical comparison

Do you mean a 2.0 TS with turbo fitted or Alfa's 2.0 V6 Turbo?

I believe the 2.0 V6 Turbo is a bit heavier than the 3.0 V6.
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Re: hypothetical comparison

It is always easier to tune a turbo than a non turbo.

With a few mods I would say the 2 litre TB would be quicker and have more torque.

As for cams, you can fit GTA cams to the 3 litre 24v and this is supposed to increase power.
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Re: hypothetical comparison

Of course, power delivery for the 3.0 is much more progressive, and better lower in the rev range compared to a turbo....
The yanks always said it, there's no substitute for cubic inches....

And you could always add a compressor later on

Last edited by jwq; 18-01-09 at 12:23.
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Re: hypothetical comparison

You also need to remember that the 2.0V6 Turbo only got the basic brakes (same as the 2.0TS). Only the 3.0/3.2V6 got the nice Brembos.

Last edited by David C; 18-01-09 at 14:53. Reason: spelling
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Re: hypothetical comparison

I would also say that the 3 litre would be nicer to drive. No turbo lag, and a more progressive power delivery.

Having said that there isn't much like the kick up the back when the turbo spools up.

You also have the potential for better fuel economy when taking it steady with a turbo.
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Re: hypothetical comparison

The 3.0 V6 is a little bit quicker than the 2.0 V6 TB, chipping almost narrows the gap, because the gain for the 3.0 is much less.

New cams are an expensive upgrade which adds only a bit of power, better invest in a supercharger or an engine conversion to 3.5 liter!
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Re: hypothetical comparison

yeah but that doesn't really give me a yes no answer to the question :P

because what i'm thinking is that a 3.0V6 has 220hp and 270Nm of torque and a company here in sweden says that chipping this will up the power by 15hp, bringing its total to 235

the V6 TB on the other hand has 200hp as standard with 280Nm of Torque and the same company will remap to increase the power with 40hp bringing it to 240

And if i've got my facts straight then a a better flowing exhaust and intake should give better power increase in a turbo engine then in a NA engine,

In any case according to this the TB after these mods should have 240+ hp and the V6 only around 235+ so the gap between them will be consideraly smaller..

So if they go head to head after these mods,

-which will do 0-60 in the shortest time?
-which will do 0-100mph in the shortest time
-which will do the quater mile in the shortest time?
-with the same driver, which do you think will go around a track (lets take the top gear track for example) in the shortest time?

=)

thnx
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Re: hypothetical comparison

The turbo should be marginally quicker in most performnace comparisons if they have the same amount of power and weight, mostly due to the better midrange performance.

Compare the performance between a 20V turbo fiat Coupe and a 3 litre 24V GTV.

They both have the same power and similar weight but the Fiat is quicker by nearly 2 seconds to 100mph.
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Re: hypothetical comparison

how much does suspension actually affect the 0-60 acceleration if it even does at all?
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Re: hypothetical comparison

It needs to be in pretty good shape otherwise the wheels might hop and spin or torque steer you off the road.

Other than that the acceleration is more down to weight, power, torque and grip
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Re: hypothetical comparison

don't forget weight transfer, which unloads the front wheels, and is more prevalent with higher and softer suspension
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Re: hypothetical comparison

but one thing that baffles me, is that autodelta sell a kit with new cams and remapped ecu which "only" gives a power increase of 25-30hp, how can so "little" take a whole second off the 0-60 time for the gtv? i thought that to get that much off more work than that was needed in the engine if the car isn't lightened...
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Re: hypothetical comparison

you should compare the power bands, maybe the autodelta starts pulling lower down the rev range, the 25 bhp difference could be there over a large part of the rev range....
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Re: hypothetical comparison

If you look at the specs it says that the rev limit is increased.

Therefore you can get to 60 in second gear, which mean one less, time consuming gear change.
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Re: hypothetical comparison

Quote:
Originally Posted by symonh2000 View Post
If you look at the specs it says that the rev limit is increased.

Therefore you can get to 60 in second gear, which mean one less, time consuming gear change.
But it says the same for a 2.0TS 156, which will already easily do 60MPH in 2nd gear as std.
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Re: hypothetical comparison

Quote:
Originally Posted by David C View Post
But it says the same for a 2.0TS 156, which will already easily do 60MPH in 2nd gear as std.
Hmmm.. now you have me thinking.

Well I suppose it depends on which figures autodelta are using to start with...

Some road tests rated the 2.0TS (in both GTV and 156)at around 8.5 seconds.

Where as Autocar rated both at around 8 seconds. They may well have used the 8.5 seconds as their reference when saying they can make it 1 second faster to 60mph..

Just a thought..
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