A few interesting observations taken from acceleration tests (speed vs. time).
The relevant speed or time values are highlighted below, and you can them all plus the whole thing in the graphs below.

Later in this thread I've covered the deceleration of our RR3 F1 cars due to braking vs. coasting only.

--- Regera vs. MP4-X vs. Venom ---

Take a look at the whole speed x time test results. Then, check the evolution of longitudinal acceleration against time.

The Regera gives a steady acceleration of ~1.13 g's during initial 60mph, takes less than 2.5 seconds doing that.
At 275 mph, she's still pumping 0.3 g's, three times the acceleration of the MP4-X, but still lower than the Venom's.
She went from 412-442 km/h in a constant, fairily precise rate of 10km/h/second.
21s 412km/h
22s 422
23s 432
24s 442

MP4-X: Found a great oscillation in acceleration during initial 60mph, because speed will rise so fast and the data collected is not accurate enough.

It was interesting to note that it went from 235 to 240mph in precisely 1 sec (12.990-13.990). Similarly for 240-245 mph.
0-60 in ~1.56 sec.

The Venom took 1 sec from 0-10 mph (0-60 in almost 3 sec, despite being rated at 2.17 s).

 00-60 1st gear (3sec)
 60-90 2nd (1sec)
 90-130 3rd
130-180 4th
180-220 5th
220-2xx 6th (xx doesn't show in dash speedo)
"It" went from 200 to 250 mph in a constant, fairily precise rate of 10mph/second (See Regera)
12s 200 mph
13s 210
14s 220
15s 230
16s 240
17s 250