1970 TTZ T-28X4
From 1970 till 1995 Tashkent Tractor Plant built improved modifications of the cotton-farming tractor Т-28Х, that got the designation Т28Х2 and Т-28Х4, having the engines of the same dimensions, but of increased up to 40 and 50 hp, correspondingly, power.
The Т28А tractor differs from the Т-28 by the availability of a front leading axle with a non-fluctuating track of the directive wheels. The Т-28P is a cultivating tractor of cross-country capability with four running wheels. The tractors Т-28M2, Т-28P2 and Т-28Х2 as distinct from the Т-28М, Т-28P and Т-28Х were equipped with the engine D-37V instead of D-30. The tractors Т-28М, Т-28М2, Т-28P and Т-28P2 are provided with a mechanical booster of the rear wheels.