Sorry, typo. He can't accelerate faster than 60 mph in 7.74 seconds and match the data. He can however accelerate slower.

So assuming he gunned it as hard as he could and he accelerated and decelerated linearly, I estimate his max speed to be between 68 to 70 mph over a period of 8.83 seconds. That is at the max acceleration he can achieve that would fit the data (60 mph in 7.74 seconds). Any other peak speed would require slower acceleration (its like a parabola). He could have accelerated faster than that, but 7.74 seconds is reasonable for an average car.