Depends on the model of Tonka with respect to Low Level and High Level top speed. The ‘Popular Plus’ version (GR1 or 4) had a fair lick of speed but could not match the ‘RS Cosworth’ version (F3) for straight line speed.
Personal bests:
870kts IAS (M1.3) @ LL (with missiles!) and she wanted to go faster. I heard that one had been flown past the 999 limit in the HUD.
M2.1 @ 43,000 and very short of fuel (even more so when the re-heat purged passing the gate!).
Chased down B1-Bs in Denmark that were trying to get away (O'sea) and also F-111s in Alaska. Never got to try it against a Fencer as it ran away at about 60 miles!
One thing the F3 was not short on was speed, which it was oddly enough designed for as an interceptor - pretty poor in a scrap with a low wing loaded fighter though!