Why does the Jaguar XJ220 have less BHP than IRL?

[sejtur]

In the game it has 515 BHP, and in a lot of sources about the real car, the BHP is north of 540. Not to be confused with the concept car, which had 500 BHP.

Is there an explanation for this?

Wikipedia

 

[TumeK5]

I'm jumping to conclusions today.

 

[SuperSportX]

That could be the Dyno HP as some cars have less output on the Dyno tests than the "official" numbers.

This one only had reportedly 520HP after being Dyno tested:
https://www.hotcars.com/ultra-rare-...ing-out-in-fresno-pops-up-on-bring-a-trailer/

 

[Batschisane52]

A little bit off topic...

But is there any car in the game that has less tire-wear than the XJ220 ?

I did some tune ups to get it close to 700PP and applied the usual racing modifications(spoilers, racing tires) and tried it out ant the WTC700 race in Le mans...and I thought there is a bug

Almost no tire wear with RH after three laps, and almost no tire wearr with RM after two laps...

 

[sejtur]

That could be the Dyno HP as some cars have less output on the Dyno tests than the "official" numbers.

This one only had reportedly 520HP after being Dyno tested:
https://www.hotcars.com/ultra-rare-...ing-out-in-fresno-pops-up-on-bring-a-trailer/

Interesting. I'm curious to see if the BHP will be restored to original when the engine is overhauled in GT Auto, has anyone done that?

Edit: tried it, did not raise BHP.

 

[chengman]

I've taken the XJ220 on SSRX and it seems the car can't break the 200mph barrier at all. Also there's seemingly no turbo lag at all? It's way too tame.

 

[pedrocor]

Shouldn't be related to the concept car, if that was the case the engine should be a 6222cc V12 NA engine, not a 3498cc V6 turbocharged engine.

I've taken the XJ220 on SSRX and it seems the car can't break the 200mph barrier at all.

The record breaking 217 mph run was made without the road going catalytic converters mounted, which pumped up the power output an extra 51hp.
Still it's believed the car, in "regular" version reached 210 mph in more than one test.

 

[GranTurismo guy]

I managed 204/5 mph, never knew that about the catalytic converters! Makes sense now why it can never reach its claimed speed in like..... any game

 

[Aloha62_2]

A little bit off topic...

But is there any car in the game that has less tire-wear than the XJ220 ?

I did some tune ups to get it close to 700PP and applied the usual racing modifications(spoilers, racing tires) and tried it out ant the WTC700 race in Le mans...and I thought there is a bug

Almost no tire wear with RH after three laps, and almost no tire wearr with RM after two laps...

That's pretty normal wear rate for an MR. A Lambo Diablo in 70-0pp spec for Lemans is pretty much the same. Tyre wear at lemans 700 just isn't an issue.

 

[Jump_Ace]

I used to LAN with a couple Volvo mechanics and they said the 240 in GT4 was off, not just HP, but dimensions weren't right. So I've always just taken the specs as 'GT Specs'.


Jerome

 

[BangsMcCoy]

Great, it looks like they got multiple specs wrong in GT7. Now I can never drive this car until they fix them all.

 

[newmedia_dev]

For the speed runs wipers were removed, there was more duck tape than refinement of panel gaps.

If you google it or those who were around at that time will remember it was a 6r4 engine in what was probably the lowest ebb of UK engineering. The 220 is not the pinnacle of UK engineering more brute force.

Why it is iconic I will never know because it was just worse than everything of the era

 

[sejtur]

Great, it looks like they got multiple specs wrong in GT7. Now I can never drive this car until they fix them all.

Eh, it’s still a great handling car nonetheless. I’m going to drive it anyway.

 

[GTvsForza]

Sheesh, some people think it's the end of the world if there's inaccurate specs. There's this thing called a hotfix.

 

[Aloha62_2]

Past GTs got the weight of the Lister Storm wrong by ~200kgs, killing the car outright. A few blurry numbers in this one isn't too bad.

 

[Techlet]

Sheesh, some people think it's the end of the world if there's inaccurate specs. There's this thing called a hotfix.

The "fully adjustable LSD" on the FXX-K still cannot be adjusted a year after launch. Surely a hotfix is coming any time now...

 

[Pizzapants]

Sheesh, some people think it's the end of the world if there's inaccurate specs. There's this thing called a hotfix.

Absurdly naive post. They’re never fixing it.

 

[RobertHammer]

it's not like you can't fix it for yourself atm right?

 

[Dave A]

there was more duck tape than refinement of panel gaps.

I love a bit of duck tape.

 

[lbpomg95]

In the game it has 515 BHP, and in a lot of sources about the real car, the BHP is north of 540. Not to be confused with the concept car, which had 500 BHP.

Is there an explanation for this?

View attachment 1251706

Wikipedia

A fully customisable ECU will put the power to exactly 542 as it should be if you'd like to have it a little more accurate. GT stats have always been a little iffy. Remember when the Ferrari F40 weighed 1350kg in the PS3 games when it should've been 1100?

I used to LAN with a couple Volvo mechanics and they said the 240 in GT4 was off, not just HP, but dimensions weren't right. So I've always just taken the specs as 'GT Specs'.


Jerome

It was way off, mainly because of weight though. I'm pretty sure the game quoted gross weight instead of kerb weight. In reality the 200 series weighed between 1250kg (2 door coupes) and 1450kg (v6 wagon automatics), so the 2.3 wagon featured in GT4 probably actually sat somewhere around the 1350 mark. What was it in the game again, like 1900kg?

 

[Batschisane52]

That's pretty normal wear rate for an MR. A Lambo Diablo in 70-0pp spec for Lemans is pretty much the same. Tyre wear at lemans 700 just isn't an issue.

I don't own the Diablo, so I can't say...

But my other MR-supercars, the Lambos(Miura, both Countachs, Aventatdor) or the Testarossa for example, with the same/equal specs(PP700, full aerodynamics, all weight reductions) all have good/very good tire wear, and are definitly better in that department than the FR and AWD cars-but still none of them comes close to that Jaguar...

 

[sejtur]

I don't own the Diablo, so I can't say...

But my other MR-supercars, the Lambos(Miura, both Countachs, Aventatdor) or the Testarossa for example, with the same/equal specs(PP700, full aerodynamics, all weight reductions) all have good/very good tire wear, and are definitly better in that department than the FR and AWD cars-but still none of them comes close to that Jaguar...

The SH tires weren’t even a quarter worn in the tokyo 600 without pitting, so no trouble in that event.

Edit: Nevermind, thought you meant too much wear.

 

[VR-SORN]

the GT7 information about the XJ220 says its 534.5 BHP.

I have tuned it to 535bhp with computer and racing exhaust manifold. It did about 210mph at 6400rpm on the test track.

Edit: corrections

 

[Pizzapants]

View attachment 1251969
the GT7 information about the XJ220 says its 534.5 BHP.

I have tuned it to 535hp with computer and racing exhaust manifold. It did about 210mph at 6400rpm on the test track.

That sounds pretty close to real-life performance.

 

[VR-SORN]

There is another thing going on with hp v bhp. An old issue I guess. My copy of the game uses bhp as seen in my image. Showing 515 bhp. The OP image shows 515 hp which is
522 bhp. I think Gran Turismo disregards that conversion.

 

[Famine]

The OP image shows 515 hp which is 522 bhp.

No, it isn't.

"BHP" is a vector quantity, measured at the crank in the scalar unit hp (1hp = 550lbft/s). You're confusing it with "metric" horsepower, which is an entirely different unit (1PS/Ch/cv = 75kgm/s) measuring the same thing.

515BHP is 515hp measured at the crank. That equals 522PS (or Ch, cv, etc).


I also remain perpetually irked at the conversions in Legends Cars being to one decimal place. Nobody in the history of things has ever said their car has 534.5hp; round up. Or down. Just round it.

Although it's worth noting that this figure is what you get to if you try to incorrectly convert 542hp from "metric" horsepower; the XJ220 should have 404kW, which - allowing for rounding - converts to 542hp and 550PS.


As for why it doesn't... 🤷‍♂️

 

[VR-SORN]

I used https://www.unitsconverters.com/en/Hp-To-Bhp/Utu-3565-4669

Its says 1bhp is 0.9863hp.
seems like there are multiple hp options for conversion tools.


additional info.
the standard "515bhp" XJ220 in GT7 will do about 210mph if you force it to 7000rpm in 5th with gearbox tune.
so it might not all be down to the engine.

 

[Famine]

I used https://www.unitsconverters.com/en/Hp-To-Bhp/Utu-3565-4669

Its says 1bhp is 0.9863hp.

Yes, it's a common misunderstanding, but "bhp" is literally "brake horsepower" and it's not a unit; it's a vector, which is measured in units of horsepower (sometimes called "mechanical horsepower").

A lot of people, and places, think "bhp" is analogous to metric horsepower (usually measured in an abbreviation of a translation of "horsepower" - PS, Ch, cv, ck among others, depending on if you're German, French, Italian, and Swedish respectively) but it isn't. Unless you're measuring bhp in metric horsepower, but then it shouldn't be called "bhp"...

The site to which you've linked is among them; 1 metric horsepower is 0.986 horsepower (and 1.013 metric horsepower is 1 horsepower). They're simply using "bhp" as another word for metric horsepower and they really, really shouldn't.


Of course metric horsepower is also evil horsecrap The metric unit of power is the watt!

 

[OldandSlow]

And don’t forget Duckpower. Yes, there is such a thing.🙂

 

[Famine]

And don’t forget Duckpower. Yes, there is such a thing.🙂

My two favourite units* are the Banana Equivalent Dose and - don't Google it - the penrig.


*I used to be a scientist; it's allowed.