Car dynamics

Datamined from ROLLER.

Game engine runs at 36 Hz (before any speed up cheats).

Speed unit conversion

ENGINES.C defines the max speed in each gear for each car ($EngineSpeed$).

CAR.C converts $EngineSpeed$ into $WorldSpeed$ which is used in the handling code (CONTROL.C) as well as .TRK files.

• $WorldSpeed = EngineSpeed \times 2.2$

FUNC2.C converts $WorldSpeed$ into mph and km/h which are displayed in the UI.

• mph $= WorldSpeed / 3$

• km/h $= WorldSpeed \times 0.625$

Note: 1 mph = 1.875 km/h in the Whiplashverse.

Car stats

Max speeds in each gear

Normal car set:

Car	Max speed in each gear (EngineSpeed)						Max speed in each gear (mph)
	1	2	3	4	5	6	1	2	3	4	5	6
Auto Ariel	48	69	106	153	199	260	35.2	50.6	77.7	112.2	145.9	190.7
DeSilva	51	91	130	170	209	254	37.4	66.7	95.3	124.7	153.3	186.3
Pulse	53	79	113	153	200	264	38.9	57.9	82.9	112.2	146.7	193.6
Global	76	104	145	202	268		55.7	76.3	106.3	148.1	196.5
Million Plus	38	64	95	139	183	256	27.9	46.9	69.7	101.9	134.2	187.7
Mission	59	81	113	151	199	258	43.3	59.4	82.9	110.7	145.9	189.2
Zizin	86	124	181	262			63.1	90.9	132.7	192.1
Reise Wagon	79	105	140	191	277		57.9	77.0	102.7	140.1	203.1
All cheat cars	55	86	139	185	229	285	40.3	63.1	101.9	135.7	167.9	209.0

Advanced car set: multiply by 1.03.

Deceleration

ENGINES.C contains each car's $Drag$ coefficient.

Deceleration per tick (1/36s):

• Coasting in gear: $\frac{V_{max}}{Drag \times 256}$

• Coasting in neutral: $\frac{V_{max}}{Drag \times 256} \times 6$

• Coasting off-road (in gear or neutral): $\frac{V_{max}}{Drag \times 256} \times 16$

• Braking: $\frac{V_{max}}{Drag \times 36}$

• Braking off-road: $\frac{V_{max}}{Drag \times 36} \times 3$

Note: $Drag$ is equivalent to the number of seconds it takes to brake to a stop from $V_{max}$ while staying in top gear.

Car	Drag	Decel (mph/s)			Vmax-0 (s)
		Coast in gear	Coast in neutral	Brake in top gear	Coast in gear	Coast in neutral*	Brake in top gear
Auto Ariel	5.7	4.7	28.2	33.5	40.5	6.8	5.7
DeSilva	4.9	5.3	32.1	38.0	34.8	5.8	4.9
Pulse	6.2	4.4	26.3	31.2	44.1	7.3	6.2
Global	8.0	3.5	20.7	24.6	56.9	9.5	8.0
Million Plus	6.6	4.0	24.0	28.4	46.9	7.8	6.6
Mission	4.4	6.0	36.3	43.0	31.3	5.2	4.4
Zizin	6.6	4.1	24.6	29.1	46.9	7.8	6.6
Reise Wagon	9.7	2.9	17.7	20.9	69.0	11.5	9.7
Godley PLC (MAYTE)	1.9	15.5	92.8	110.0	13.5	2.3	1.9
Other cheat cars	2.9	10.1	60.8	72.1	20.6	3.4	2.9

*Theoretical assuming engine doesn't cut out.