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Old 12-07-1999, 01:18 AM   #1 (permalink)
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Default 240z vs 260z

Hi Z lovers once again

Dose anyone know which Z is the quicker Z.
I am talking in stock standard condition anyway.

Because I found a site on the internet that said that the 260z has less bhp (139) then the 240(151) because of emission control laws introduced.

But what is really confusing is that my car manual tells me that the 260 has more bhp with 164.

is this true? is the 260z quicker then the 240 because common sense would say so because of the slighly larger motor.

Thanks boys

JRZ (Adelaide, South Australia) SOR-458
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Old 12-07-1999, 01:36 AM   #2 (permalink)
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Default RE: 240z vs 260z

OK, this is a bit of a grey area. I live in Oz also so our cars were a bit different. In Australia if you put a stock 240Z against a stock 260Z the 240 would be faster. As a matter of fact the 240Z was the fastest Z until the arrival of the 1st Gen 300ZX Turbo. This is in Australia remember. The US and Europe received different cars.

It is true that the 260 should be faster simply because of a larger engine capacity but this was done to combat power-robbing emissions laws that were introduced in Japan. This is also the reason that the 280Z/ZX had an increased capacity and fuel injection. To again combat these laws.

I believe that the very early 260Z's (2 seaters from late 73 to early 74) were not subject to the new emissions laws and actually did have more horsepower. Then again you can't always believe what is written in your car. I don't think the 280Z/ZX had 170+ horsepower but this is what little plate in the engine bay claims.

I could be wrong about o/s on this stuff but I'm about 99% sure what I have said is relevant in Australia.
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Old 12-07-1999, 03:48 AM   #3 (permalink)
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Default RE: 240z vs 260z

Forget the 164hp quote that's in your car's manual. That was a GROSS rating that was essentially a meaningless result of the horsepower wars of the 1960s. The feds outlawed the GROSS rating in the late 1970s which is why many people think that the 280zx had less power than the 280z, even though their engines were almost identical. While the 260z may have more horsepower than a 240z on a good day, the 260z also weighed a little more than the 240z, and suffered from hideous drivability problems. No road test in the US ever gave the 260z a 0-60 less than 10 seconds, while The 70-72 240z did it in about 7.8 seconds. The 73 240z was the slowest at 11 seconds due to lower compression and diabolically bad carburators.

Try to obtain NET horsepower ratings for comparisons: 240z-121hp, 260z-132hp, 280z&280zx-149hp, 280zxt-180hp.

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Old 12-07-1999, 05:52 AM   #4 (permalink)
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Default RE: 240z vs 260z

I know for a fact that the Australian cars were built to a different specification to the US ones.

They were faster, a major reason why the 260Z lasted from 74 to 78 here but only one year in the us untill the 280z (a car never sold in aus) took its place.

Glass' dealer guide says that the 260Z had 121kW of power, 161hp, the 240 had 151hp. Hence maybe your manual is not too far off.

seeing the main reason the 260 sucked in the us was the carbies, maybe the aus one had better carbies.
either way, the 240 carbies on a 260 give better performance, and alot of 260 have these in anyway

then there was the axtra mass of the 260 which would reduce performace.

One thing is for sure and thats that the 260z Aus was better than the us one, just by how much...i would say quite a bit, maybe not enought to beat a 240 but close i would think

Aust. Classic Car had an article on these two cars in their december 96 issue, except its not on their wesite anymore if you can find it it should shed some light on the issue.

On paper it would seem that the Australian 240 and 260 would be quite similar in performance, but paper is not bitchumen. Maybe the best way is to find a stock 240 and 260 and have a drag

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Old 12-07-1999, 10:18 AM   #5 (permalink)
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Default RE: 240z vs 260z

Also the weight variation would make a difference I think. The 260 and 280 were heavier than the 240 wasn't it . Without any major modifications that would make the cars slower when indeed they have a larger motor.
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Old 12-08-1999, 01:29 AM   #6 (permalink)
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Default 240z vs 260z ????????

Thanks boys

but you have me worried because i have an 73 240z dose this mean that my car has bad carbies, because my car is quicker then 11 to 100kph io know i clocked it or is this not the case for australian 240z's

thanks boys

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