GTR v 991 GT3 RS half mile drag race - Evo

[9e 28]

https://www.youtube.com/watch?v=IkGhiTSS8M8

Interesting outcome. Bet you can't guess winner!

[RSVP911]

9e 28 said:

https://www.youtube.com/watch?v=IkGhiTSS8M8

Interesting outcome. Bet you can't guess winner!

Yep - that surprised me . I love the RS 0-60 time . Hard to comment as don't want to spoil it

[Evolved]

300kg lighter is HUGE! The GTR is just too lardy.

[9e 28]

You can't defy physics. I'd say the GT3 RS is putting out at least power to weight of 400bhp/tonne rather than 350bhp/tonne as per Porsche claims judging by some of the lap times I've seen. Incredibly a GT3 RS can keep a 675 LT honest around a track which is 550bhp/tonne

[isaldiri]

9e 28 said:

Incredibly a GT3 RS can keep a 675 LT honest around a track which is 550bhp/tonne

How do you get your numbers...? A 675 is erm 675 PS and will weigh around 1380kg.

Which track as well has the RS 'kept a 675 honest'....?

[9e 28]

isaldiri said:

9e 28 said:

Incredibly a GT3 RS can keep a 675 LT honest around a track which is 550bhp/tonne

How do you get your numbers...? A 675 is erm 675 PS and will weigh around 1380kg.

Which track as well has the RS 'kept a 675 honest'....?

All the info here

http://fastestlaps.com/comparisons/10h9oec61ozm

[isaldiri]

9e 28 said:

All the info here

http://fastestlaps.com/comparisons/10h9oec61ozm

That's what you get from taking 'fastestlaps' at face value..... The weight for the 675 they are using is dry weight while the RS is 90% fuelled. Real world and fully fuelled, the RS probably weighs 1475kg or thereabouts, the 675 will weigh about 1390kg. Bit of variation due to spec obviously.

[9e 28]

isaldiri said:

9e 28 said:

All the info here

http://fastestlaps.com/comparisons/10h9oec61ozm

That's what you get from taking 'fastestlaps' at face value..... The weight for the 675 they are using is dry weight while the RS is 90% fuelled. Real world and fully fuelled, the RS probably weighs 1475kg or thereabouts, the 675 will weigh about 1390kg. Bit of variation due to spec obviously.

Okay noted but the lap times are very close indeed. The weight I blame on manufacturers for not simply giving us the fully laden weight. I also do not think one can dispute that the 991 GT3 RS is putting out a fair bit more than 500PS. Probably more like 550-570PS judging by the video. Fabulous engineering to get that sort of power out of a n/a flat 6 and for that car to then be able to stay in touch with a carbon tubbed twin turbo lightweight Macca.

[isaldiri]

9e 28 said:

I also do not think one can dispute that the 991 GT3 RS is putting out a fair bit more than 500PS. Probably more like 550-570PS judging by the video. .

not plausible imo for the 991rs to be putting out anything like 550 PS.

I'd suggest the difference between the cars in the video is tyre related rather than hp to be honest as the GTR likely wasn't using the nismo spec NR1 tyre (couldn't read off the tyre sidewall from the video) and the standard gtr tyre isn't the equivalent spec sport maxx race tyre that is the other Porsche option comparable to the Cup2, especially given the 0-60 times which is mainly tyre limited these days.

[9e 28]

isaldiri said:

9e 28 said:

I also do not think one can dispute that the 991 GT3 RS is putting out a fair bit more than 500PS. Probably more like 550-570PS judging by the video. .

not plausible imo for the 991rs to be putting out anything like 550 PS.

I'd suggest the difference between the cars in the video is tyre related rather than hp to be honest as the GTR likely wasn't using the nismo spec NR1 tyre (couldn't read off the tyre sidewall from the video) and the standard gtr tyre isn't the equivalent spec sport maxx race tyre that is the other Porsche option comparable to the Cup2, especially given the 0-60 times which is mainly tyre limited these days.

Still does not explain the GT3 RS extraordinary lap times against 675 LT. Here's lap times comparison against 7 GT2 RS where its giving away 120bhp and 50kg weight penalty. Maybe chassis and PDK so good that they can make up a 50kg weight penalty and 120bhp power deficit who knows? To me logic says GT3 RS must have more power than quoted. If you'd told me a GT3 RS could nudge a GTR over half mile I'd have said no way on any tyres!

http://fastestlaps.com/comparisons/lllu2novaplh

[isaldiri]

9e 28 said:

Still does not explain the GT3 RS extraordinary lap times against 675 LT. Here's lap times comparison against 7 GT2 RS where its giving away 120bhp and 50kg weight penalty. Maybe chassis and PDK so good that they can make up a 50kg weight penalty and 120bhp power deficit who knows? To me logic says GT3 RS must have more power than quoted. If you'd told me a GT3 RS could nudge a GTR over half mile I'd have said no way on any tyres!

http://fastestlaps.com/comparisons/lllu2novaplh

The 7gt2RS is on an older tyre, the current cup2 is imo a good bit faster than the cup+ on the 7rs cars.

I still don't think the times are that close between the 675 and RS. 1.3 seconds on hockenheim short for sport auto is a huge difference given it's a 70 second ish lap. You can't be expecting 2+ second differences for that? Last i heard a 675 absolutely spanked a bunch of 991RS at Spa in April with quite a few Phers in attendance for example.. the RS is a great car and a lot faster than one would expect a 500hp near 1500kg car but comparing performance to the 675 is a bit nuts and not really sensible imo given the spec and price differences.

[9e 28]

isaldiri said:

9e 28 said:

Still does not explain the GT3 RS extraordinary lap times against 675 LT. Here's lap times comparison against 7 GT2 RS where its giving away 120bhp and 50kg weight penalty. Maybe chassis and PDK so good that they can make up a 50kg weight penalty and 120bhp power deficit who knows? To me logic says GT3 RS must have more power than quoted. If you'd told me a GT3 RS could nudge a GTR over half mile I'd have said no way on any tyres!

http://fastestlaps.com/comparisons/lllu2novaplh

The 7gt2RS is on an older tyre, the current cup2 is imo a good bit faster than the cup+ on the 7rs cars.

I still don't think the times are that close between the 675 and RS. 1.3 seconds on hockenheim short for sport auto is a huge difference given it's a 70 second ish lap. You can't be expecting 2+ second differences for that? Last i heard a 675 absolutely spanked a bunch of 991RS at Spa in April with quite a few Phers in attendance for example.. the RS is a great car and a lot faster than one would expect a 500hp near 1500kg car but comparing performance to the 675 is a bit nuts and not really sensible imo given the spec and price differences.

All imo but a less than 2 sec advantage over a 70 sec lap is nothing considering GT3 RS on paper at least is 120kgs heavier and with166bhp less than a 675 LT. I think they're entirely comparable and at any price point I'd have the RS! Astonishing piece of kit. sure you stick a race car driver in either of them and he'll spank the gentleman racers at Spa whatever they're in

If anything in dry Cup + is quicker than Cup 2. Cup 2 better in wet and lasts longer but gives away a bit of pace and pretty sure it was developed specifically for GT2 RS.

[LaSource]

There has been many a Spa/Silverstone trip recently showing the 675 to be a lot quicker than the RS - but that not really a surprise given the design briefs and price points.

Fastestlaps.com is not an authoritative source imv. Some of the laps are posted by amateurs, plus no data on conditions, tyres, etc.

The RS has a very good launch control process...plus it is interesting how the 4wd vs rear engine layout is working for a standing launch. You can see in the slow motion vid the Nissan is exhibiting a lot more rear wheel slip (less weight at the back with a rear biased 4wd system??) whilst the RS has a much more efficient take off.

[R0B.]

Is the 991 GT3 RS not a £250,000 car nowadays? in which case the £50-60k GTR did pretty well

[cypriot]

A certain Mr. Chris Harris did a nice vid showing that a 650s was faster than a GT3 RS round a track, and the Macca wasn't even on sticky tyres. The 675LT would demolish the RS, as he states is the vid, and you can alway see why. The Macca is lighter, more powerful, and has more aero. But who am I to judge? I am just a keyboard warrior!!

[Sam All]

cypriot said:

... The Macca is lighter, more powerful, and has more aero. But who am I to judge?

Such a simple concept - so difficult for many to understand - anyone mention the 620R yet?

All RS cars punch above their "weight " in VFM stakes

GTRs amazing value

675LT etc - higher league, different generation.

[Upnorthgt3]

The RS sounded amazing in the vid too, much better than the GTR

Wish it was possible to get hands on one at the original price.......

Great car

[Steve Rance]

I've seen quite a few 991RS's and 675LT's at both Spa and Silverstone. If I had a choice in a head to head race, i'd take the 675 every time. The 991 is a very quick car though

[TB993tt]

9e 28 said:

I also do not think one can dispute that the 991 GT3 RS is putting out a fair bit more than 500PS. Probably more like 550-570PS judging by the video. Fabulous engineering to get that sort of power out of a n/a flat 6 and for that car to then be able to stay in touch with a carbon tubbed twin turbo lightweight Macca.

Im, I think you have to take into account the relative driveline losses and the obvious 288kg weight differences.

The GTR from what I can find out has much higher 4WD driveline losses and puts about 425hp to the asphalt and the RS will be probably just over 400hp, that massive weight difference, the amazing rear engine launch and the mega advanced LC and PDK together with the NA motor not having to maintain boost during gearchanges makes for the RSs dominance - 911s are pretty special

[mdianuk]

Just imagine what the 911R will do without the drag from that wing. Only issue being the slower gear changes.