Would you rather: 4A-GE-powered GR86 or FA24-powered AE86?

4AGE all things. 

FA24-powered AE86, power-to-weight ratio dictates it. You'd have to get on the forefront of solving the oil starvation problem, but on the plus side the engines are still in production so you won't have to choose between hunting down rare antique 4AGE bits and forking over fat stacks of cash for new small-batch aftermarket substitutes.

In reply to GameboyRMH :

I was thinking along the same lines, then I thought "why be logical?"

4AGE GR86 for me.

In reply to j_tso :

I've had the 4AGE back before it aged out, and while sweet, it was weak in stock form. The package was delightful. All the upscale comfort and convenience details, the cool appearance, Even decent RWD dynamics, but forget about tossing out the rear on power application. Some of the Formula Atlantic engine enhancements would have been welcome, though they may have revealed other weaknesses in the package. Still, Delightful car.

I spent nearly a decade with my AE86 race car,stock'ish 4ag,supercharged 20v(gze bottom end)and turbo 16v(same gze bottom end)with quad carbs for power plants.

 Ok engine but so many better 4 cyl options 4 decades after it was designed.

I'll take the AE-86 and then swap in something that makes sense to me.  The older car is harder to obtain, all things being equal and that's my rationale.

K24-powered GR86?  

So now people think the GRZ would be better with less hp and tq?

Can I get a BRZ with an FA24?  If anyone is unhappy with theirs and wants to give it away, I will give it a home.

I changed my mind. The most logical engine choice/change for the GR86 would be for Toyota to drop the GR Corolla turbo 3-cylinder in it. A 300HP GR86 from the factory would get my checkbook out very quickly.