adamsbomb

I am just curious, 76 911 with a stock 3.0ltr vs a stock 928. which is faster (or quicker) say from a stoplight to 50mph and from say 40 to 100? assuming you take the driver out of the equation

ZAMIRZ

the 928.

craigg

...or a Boxster S.

GrantG

Well a 77 911 didn't have a stock 3.0L (was 2.7) and the 928s varied a great deal through the years (weight, horsepower and gearing).

A stock 77 911 had only 150hp, while early 928s (from the 70s) had 225-240 I believe. Early 928s weighed about 400lbs more. With an automatic, it'd be a close race (still probably favoring the 928), but a 5-speed 928 (from any year) should make quick work of a 77 911 in a straight-line test. On a road course, could be the other way around...

Steve Wilwerding

Out of curiousity, what sort of acceleration could I expect from my Euro SC w/o sunroof and added weight (that is, doesn't have all of the weight that American cars doin the doors and such). I would think that a stock Euro SC would be pretty fast, with 204 HP and pretty low weight.

adamsbomb

By stock 3.0, I meant know modifications, it is a 3 ltr that has been swapped into the car, sorry if that was unclear.

Alan Herod

If you could find the performance figures on the Carrera 3.0, which was the limited production 77 with 3.0 you would be pretty close. But if the swap was made with the early US SC motor you would be giving up a lot in power.

Only specs I have:
Carrera 3.0 (75-77) - 200 HP, 188 torque
78 SC 3.0 - 180 HP, 175 torque
78 (ROW) - 188 hp, 188 torque
81 (ROW) SC - 204 Hp, 189 torque

It was my understanding that the US SCs got a bump in power somewhere, but I can't find it. Maybe someone else has the answer.

I know that a 928 will have to do a big lift to let me get by when accelerating between 88 and 130 (front straight at Summit Point). (Somewhat lightened Euro SC Sunroof with SSIs datapoint). I don't think there is anywhere that a 200 horsepower 77 911 will out drag a 928; Although, I wish it weren't so.

Steve - In the same area the Euro SC will run down (not quickly) a WRX.

<img src="graemlins/beerchug.gif" border="0" alt="[cheers]" />

Bill Gregory

[quote]<strong>It was my understanding that the US SCs got a bump in power somewhere, but I can't find it. </strong><hr></blockquote>

US SC's kept the same hp/torque the entire run.

Alan Herod

Bill, I know that is what I found too, but I think it is odd that they raised the compression from 8.6 to 9.3, added a catalytic converter, changed the cam timing, and reduced the exhaust port size and came out with exactly the same power and torque.

Also interesting that the 76-77 3.0 achieved 200 HP with 8.5:1 compression, unless the lamda sonde and cat robbed that much horsepower.

Still the point is to determine which 3.0 engine is in the car of the many possible variations, including exhaust systems.

adamsbomb

Will try to post the number from my engine to see if someone can hepl id it.

pig4bill

If it has the SC motor, it should be faster than a 928 of the same era because the 911 SC was faster 0-60 than the same year 928. I have (or had, before it was destroyed in a flood) a Car & Driver from 1978 where they tested the "new" SC. 0-60 it was either 5.5 or 6.0, I can't remember which.

Tinton

The 204hp sc was claimed to do it in 6.3 seconds by the last book I read. The carrera 3.0 came in at 6.1. Im not a real big 'believer' in stats though, all depends on the condition of the car. The cars aren't brand new now....

Anthony

Alan Herod

To reiterate my data point. My SC (204 Euro, SSIs, 2500 lbs) will hold its own with stock 3.2s and earlier 951s on accel. The only datapoint I have with an early 928, I mentioned earlier. Conditions clear day, red/instructor run group Summit Point. 928 gave me passing signal coming out of 10 where I had a high closure rate. (Speed gun through 10 at 86-88 mph) My faster speed through 10 and momentum allowed me to pull even with him before pit out, but he was back beside me before start finish, and we were closing on a new WRX. At about 6000 in fourth we exchanged glances and he gave me a hand signal to go faster, it had been on the floor since 10. He was still next to me entering the braking zone at 6800 in fourth. Since we had overtaken the WRX, and a 930 had overtaken all of us, the only place to go was down the inside. WRX does not have the brakes of a 911. The 928 driver was just toying with me on the straight and without the WRX could have pulled away. I don't believe there is any acceleration regime where an SC owner will take even the earliest 928, and forget it if it an S4 or GTS, those will hold their own against a 930. There are a number of these well driven, fast 928s in our region. 911 series generally dominate on the road course, but of course there are about 15-20 911s for every 928.

Numbers recorded in magazines are generally accomplished with no regard for any of the drive train components, and magazine informally duel each other to achieve the fastest performance numbers for a given model. Personal opinion & not wanting to start a war with 928 folks - I think a 928 is better suited to drag racing and touring (ultimate long distance touring machine) then a 911 and a 911 is better suited to enthusiast driving then a 928.

Richard Bernau

You guys might be short changing the good old 911. I think in the 0-50mph test the 911 would be quicker. All 911s have such good traction off the line that with a good launch you can get to 30mph or so quicker than just about any road cars. Period.

I recall a Porsche Club Drag Racing day a few years ago where I lined up next to an auto 928S4 in a 2.4E. In its then state of tune (before rebuild of MFI pump etc) it would have been lucky to make 150hp, so I thought I would get thoroughly spanked. I mean what does the 928 driver have to do other than stand on the right pedal? Well, I nailed it off the line with just a smidgen of wheelspin and the 928 never saw anything but dust - he was still way behind after the quarter mile. Sorry I can't remember the quarter mile times but I think they were below 14.5secs.

Could be very different in the 40-100mph test but off the line I would back the 911 every time. Just my $0.02.

Richard Bernau

Alan Herod

Richard, You might be right, I have never drag raced off the line in the 911. Likewise, I can't imagine anything more destructive to a 901/915 trans. I remember a while back, dueling magazines not getting a week out of a C4 clutch, certainly not something I can afford.