Acroding to the book (Aircraft of world war II 300 of the wolds greatest aircraft)
The KI-84-la `FRANK' stats were---->
Powere plant: 1900hp Nakajima Ha-45 (army type 4) 18 cylinder to -row radial engine
Preformance: max speed 631km/h (392mph); climb to 5000m (16,405ft) in 5 min 54 sec; service ceiling 10,500m (34,450ft);range 2168km (1347 miles)
Weights: empty 2660kg (5864lb); normal take-off 3613kg (7955lb); max take-off 4170kg (9193lb)
Dimensions: span 11.24m (36ft 10.5 in); length 9.92m (32ft 6.5in); height 3.39m (11ft 1.25in)
Armament: two 20mm fixed forward-firing cannon in the leading eges of the wing, and two 12.7mm fixed forward firing machine guns in the forward fuselage, plus a external bomb load of 500kg (1102lb)
these stats may vary from AH2 a bit as far as the speed go's I've noticed this in other planes already in the game.
This book dosn't seem to have stats for the La-7 just the La-5 so for the comparison of La-5 to the Ki-84-la is that the La-5 is just a touch faster at 403mph, climbs to 16,405ft 54sec faster, it's lighter all around but not by a huge difference empty the La-5 is 5743lb and max take-off is 7500lb.
The La is just a touch smaller in dimensions but just by a couple feet on each. and of course the La-5 only has the 2 20mm cannons and the 1102lb bomb load.
And as far as the N1K-j go's this book has the stas for the N1K1-J not the N1K2-j we have in the game but I'm going to asume they would be similar so here it is
The N1K1-J was slower than the Ki-84 at 361mph, climb was 19,685ft in 7min 50sec, empty 6387lb max take-off 9526lb, It was shorter in wingspan and length and of course it had the cannons we all love.

Well there you go and like I said the books stats seem to differ from the game a bit. And sorry I don't have the stats for the la-7 and the N1K2-J but I hope this will help some, I tried
