What is the percentage difference between 1/24 and 1/25?

[LDO]

I think it’s roughly 4%. Am I doing the math right? 
 

Thanks, Lee

[SSNJim]

That's what I get:

(1/25) / (1/24) = 96%

(1/24) / (1/25) = 104%

Just about 4%.

 

[JollySipper]

................

 

Edited May 30 by JollySipper

[Carmak]

For a common muscle car (68-72 GM A body) the difference in wheelbase between 1/24 and 1/25 is about 3/16".

[gtx6970]

All depends on manufacturer .

 

Put a Monogram 1970 GTX side by side with a Johan version. 

And the difference is very noticeable

Edited May 30 by gtx6970

[Chris V]

The math speaks for itself, but in reality it depends on whether the models are truly true to scale…

It’s been debated on numerous occations, but some scale models have rather exaggerated proportions.

[Rodent]

I have always thought most of the old Monogram muscle car kits seemed larger than 1:24, but I have never measured any of them.

[Matt Bacon]

The math don't lie: 4%

But, unless you collect only a very specific model of car, when are you likely to see 1/24 and 1/25 models of the same thing side by side in your display cabinet? European and Japanese cars tend to come in 1/24, and US cars (which are generically larger in the first place) come in 1/25. In 25+ years of adult building there are literally only two examples I can think of where my shelves might have the two different scales in close proximity: the Jaguar XK-E (AKA E-Type) where I have a Revell UK (also Revell USA) convertible in 1/25 alongside Heller, Gunze and Revell Germany 1/24 kits; and a 1/24 GTO "The Judge" based on a diecast kit. The latter, incidentally, dwarfs all the other cars it's on a shelf with. Am I tuned-in enough to detect the difference in scale between  my Jo-Han Cadillac or AMT Chrysler (1/25) and my Monogram Duesenberg or Packard (1/24)...? No.

best,

M.

[Shark]

4 hours ago, Chris V said:

The math speaks for itself, but in reality it depends on whether the models are truly true to scale…

It’s been debated on numerous occations, but some scale models have rather exaggerated proportions.

One personal example, both kits listed as 1/25 scale. I was taking the chassis and drive train from the Revell Hemi Dart and putting it under the old MPC '69 Barracuda. I had to trim about 1/4" out of the wheel base and I think it had to be narrowed too. Should have been a drop in.

[Can-Con]

2 minutes ago, Shark said:

One personal example, both kits listed as 1/25 scale. I was taking the chassis and drive train from the Revell Hemi Dart and putting it under the old MPC '69 Barracuda. I had to trim about 1/4" out of the wheel base and I think it had to be narrowed too. Should have been a drop in.

'69 Dart wheelbase is 111", '69 Barracuda wheelbase is 108". Not exactly a "drop in".

About 1/8" difference in 1/25 scale.

[michelle]

25 minutes ago, Can-Con said:

'69 Dart wheelbase is 111", '69 Barracuda wheelbase is 108". Not exactly a "drop in".

About 1/8" difference in 1/25 scale.

i can see why shark might have thought that though since both the 67-76 darts and the 64-69 cudas were  both chrysler A body  platform cars  

[gtx6970]

3 hours ago, michelle said:

i can see why shark might have thought that though since both the 67-76 darts and the 64-69 cudas were  both chrysler A body  platform cars  

As a general rule.

Dodge tends to be a slightly longer wheelbase compared to its Plymouth cousin. This applies all across the Mopar line

[michelle]

55 minutes ago, gtx6970 said:

As a general rule.

Dodge tends to be a slightly longer wheelbase compared to its Plymouth cousin. This applies all across the Mopar line

i was able to use a mpc 69 charger snap kit chassis with a amt 68 road runner and it fit perfectly 
and i have used a lindberg 72 challenger chassis on a mpc 72 cuda and other than those tall posts on the rear of the chassie having to be removed it fit pefectly 
i have also used a  mpc 69 charger chassis on a mpc 70 super bee and it fit 
and have used a mpc 75/76 dart sport chassis on a amt 71 duster and it fit 
and used a mpc 77/78 monaco sedan chassis on a joh-han 68 fury sedan 

Edited May 31 by michelle

[LDO]

10 hours ago, Chris V said:

The math speaks for itself, but in reality it depends on whether the models are truly true to scale…

It’s been debated on numerous occations, but some scale models have rather exaggerated proportions.

This is what got me to ask. I saw a post on Facebook about a Revell 1/25 Japanese import car and a Tamiya 1/24 model of the same car. (I don’t remember what car it was) There were pics of both kits side by side and the difference looked like more than 4%. I wanted to go back and say one or both might not be accurate. I couldn’t find that post again. 

[bobss396]

I mix scale parts all the time. I know some that will build only 1/25 scale and nothing else.

Sometimes a 1/24 scale engine fills the engine bay in a 1/25 car a bit more.

[Force]

16 hours ago, Shark said:

One personal example, both kits listed as 1/25 scale. I was taking the chassis and drive train from the Revell Hemi Dart and putting it under the old MPC '69 Barracuda. I had to trim about 1/4" out of the wheel base and I think it had to be narrowed too. Should have been a drop in.

 

16 hours ago, Can-Con said:

'69 Dart wheelbase is 111", '69 Barracuda wheelbase is 108". Not exactly a "drop in".

About 1/8" difference in 1/25 scale.

 

15 hours ago, michelle said:

i can see why shark might have thought that though since both the 67-76 darts and the 64-69 cudas were  both chrysler A body  platform cars  

 

12 hours ago, gtx6970 said:

As a general rule.

Dodge tends to be a slightly longer wheelbase compared to its Plymouth cousin. This applies all across the Mopar line

Yes you can't compare Dodge and Plymouth that way as Dodge tends to have a slightly longer wheelbase than Plymouth.
Some examples are the Dart/Barracuda A-body, 3 inches difference and the Dart is longer, Challenger/'Cuda, same E-body platform but the Challenger has 2 inch longer wheelbase, the B-body Dodge Charger and Plymouth GTX/Roadrunner has a difference in wheelbase of 1 inch and the Charger is longer.

Likewise for Ford and Mercury, the Mercury Cougar has longer wheelbase than the Ford Mustang even tho' they share the platform, difference 3 inches.