Schlegel Farms, Hagerstown Indiana | I'm pretty sure that Deere had the 5010 out before AC had the D-21 out.
AC was the first company to turbo a farm tractor (D-19) but they dropped the ball with the first 21's being NA.
I owned a D21 and a 1206 both. Myself I think the 1206 is king of the muscle tractors.
The 21 I had had a lot more power than the 1206 I own now.................but the 21 would melt the pistons in it ran under a load for much more than 20 seconds, (-:
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Allis d-21 greatness
