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Gear Ratio Calculator >>

2012 Ferrari 458 Italia 7 speed DCT Gear Ratios Calculator, MPH, Top Speed

 


This calculator outputs the how fast the Ferrari 458 Italia can go in each gear as calculated by the gear ratios, engine redline and tire size.
The ultimate top speed may be limted by the power, drag and aerodynamics of each individual car.

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Tire Size
(345/30/20)
/ -
OR
Tire Diameter
(inches)
 
Final Drive Ratio
Redline (RPM)
1st Gear
2nd Gear
3rd Gear
4th Gear
5th Gear
6th Gear
7th Gear
8th Gear

RPM 1st Gear 2nd Gear 3rd Gear 4th Gear 5th Gear 6th Gear 7th Gear 8th Gear
500 2.64 3.72 4.99 6.31 7.9 9.69 11.8 0
600 3.17 4.46 5.99 7.57 9.48 11.63 14.16 0
700 3.7 5.2 6.99 8.83 11.07 13.57 16.52 0
800 4.23 5.95 7.99 10.1 12.65 15.51 18.88 0
900 4.76 6.69 8.99 11.36 14.23 17.44 21.24 0
1000 5.29 7.43 9.99 12.62 15.81 19.38 23.6 0
1100 5.81 8.18 10.99 13.88 17.39 21.32 25.96 0
1200 6.34 8.92 11.99 15.15 18.97 23.26 28.32 0
1300 6.87 9.66 12.99 16.41 20.55 25.2 30.68 0
1400 7.4 10.41 13.98 17.67 22.13 27.14 33.03 0
1500 7.93 11.15 14.98 18.93 23.71 29.07 35.39 0
1600 8.46 11.9 15.98 20.19 25.29 31.01 37.75 0
1700 8.99 12.64 16.98 21.46 26.87 32.95 40.11 0
1800 9.52 13.38 17.98 22.72 28.45 34.89 42.47 0
1900 10.04 14.13 18.98 23.98 30.03 36.83 44.83 0
2000 10.57 14.87 19.98 25.24 31.61 38.77 47.19 0
2100 11.1 15.61 20.98 26.5 33.2 40.7 49.55 0
2200 11.63 16.36 21.97 27.77 34.78 42.64 51.91 0
2300 12.16 17.1 22.97 29.03 36.36 44.58 54.27 0
2400 12.69 17.84 23.97 30.29 37.94 46.52 56.63 0
2500 13.22 18.59 24.97 31.55 39.52 48.46 58.99 0
2600 13.74 19.33 25.97 32.82 41.1 50.39 61.35 0
2700 14.27 20.07 26.97 34.08 42.68 52.33 63.71 0
2800 14.8 20.82 27.97 35.34 44.26 54.27 66.07 0
2900 15.33 21.56 28.97 36.6 45.84 56.21 68.43 0
3000 15.86 22.3 29.97 37.86 47.42 58.15 70.79 0
3100 16.39 23.05 30.96 39.13 49 60.09 73.15 0
3200 16.92 23.79 31.96 40.39 50.58 62.02 75.51 0
3300 17.44 24.53 32.96 41.65 52.16 63.96 77.87 0
3400 17.97 25.28 33.96 42.91 53.74 65.9 80.23 0
3500 18.5 26.02 34.96 44.17 55.33 67.84 82.59 0
3600 19.03 26.76 35.96 45.44 56.91 69.78 84.95 0
3700 19.56 27.51 36.96 46.7 58.49 71.72 87.31 0
3800 20.09 28.25 37.96 47.96 60.07 73.65 89.67 0
3900 20.62 28.99 38.96 49.22 61.65 75.59 92.03 0
4000 21.14 29.74 39.95 50.48 63.23 77.53 94.38 0
4100 21.67 30.48 40.95 51.75 64.81 79.47 96.74 0
4200 22.2 31.22 41.95 53.01 66.39 81.41 99.1 0
4300 22.73 31.97 42.95 54.27 67.97 83.35 101.46 0
4400 23.26 32.71 43.95 55.53 69.55 85.28 103.82 0
4500 23.79 33.45 44.95 56.8 71.13 87.22 106.18 0
4600 24.32 34.2 45.95 58.06 72.71 89.16 108.54 0
4700 24.84 34.94 46.95 59.32 74.29 91.1 110.9 0
4800 25.37 35.69 47.95 60.58 75.87 93.04 113.26 0
4900 25.9 36.43 48.94 61.84 77.46 94.97 115.62 0
5000 26.43 37.17 49.94 63.11 79.04 96.91 117.98 0
5100 26.96 37.92 50.94 64.37 80.62 98.85 120.34 0
5200 27.49 38.66 51.94 65.63 82.2 100.79 122.7 0
5300 28.02 39.4 52.94 66.89 83.78 102.73 125.06 0
5400 28.55 40.15 53.94 68.15 85.36 104.67 127.42 0
5500 29.07 40.89 54.94 69.42 86.94 106.6 129.78 0
5600 29.6 41.63 55.94 70.68 88.52 108.54 132.14 0
5700 30.13 42.38 56.93 71.94 90.1 110.48 134.5 0
5800 30.66 43.12 57.93 73.2 91.68 112.42 136.86 0
5900 31.19 43.86 58.93 74.47 93.26 114.36 139.22 0
6000 31.72 44.61 59.93 75.73 94.84 116.3 141.58 0
6100 32.25 45.35 60.93 76.99 96.42 118.23 143.94 0
6200 32.77 46.09 61.93 78.25 98 120.17 146.3 0
6300 33.3 46.84 62.93 79.51 99.59 122.11 148.66 0
6400 33.83 47.58 63.93 80.78 101.17 124.05 151.02 0
6500 34.36 48.32 64.93 82.04 102.75 125.99 153.38 0
6600 34.89 49.07 65.92 83.3 104.33 127.93 155.73 0
6700 35.42 49.81 66.92 84.56 105.91 129.86 158.09 0
6800 35.95 50.55 67.92 85.82 107.49 131.8 160.45 0
6900 36.47 51.3 68.92 87.09 109.07 133.74 162.81 0
7000 37 52.04 69.92 88.35 110.65 135.68 165.17 0
7100 37.53 52.78 70.92 89.61 112.23 137.62 167.53 0
7200 38.06 53.53 71.92 90.87 113.81 139.55 169.89 0
7300 38.59 54.27 72.92 92.13 115.39 141.49 172.25 0
7400 39.12 55.01 73.92 93.4 116.97 143.43 174.61 0
7500 39.65 55.76 74.91 94.66 118.55 145.37 176.97 0
7600 40.17 56.5 75.91 95.92 120.13 147.31 179.33 0
7700 40.7 57.25 76.91 97.18 121.72 149.25 181.69 0
7800 41.23 57.99 77.91 98.45 123.3 151.18 184.05 0
7900 41.76 58.73 78.91 99.71 124.88 153.12 186.41 0
8000 42.29 59.48 79.91 100.97 126.46 155.06 188.77 0
8100 42.82 60.22 80.91 102.23 128.04 157 191.13 0
8200 43.35 60.96 81.91 103.49 129.62 158.94 193.49 0
8300 43.88 61.71 82.91 104.76 131.2 160.88 195.85 0
8400 44.4 62.45 83.9 106.02 132.78 162.81 198.21 0
8500 44.93 63.19 84.9 107.28 134.36 164.75 200.57 0
8600 45.46 63.94 85.9 108.54 135.94 166.69 202.93 0
8700 45.99 64.68 86.9 109.8 137.52 168.63 205.29 0
8800 46.52 65.42 87.9 111.07 139.1 170.57 207.65 0
8900 47.05 66.17 88.9 112.33 140.68 172.51 210.01 0
9000 47.58 66.91 89.9 113.59 142.26 174.44 212.37 0
RPM 1st Gear 2nd Gear 3rd Gear 4th Gear 5th Gear 6th Gear 7th Gear 8th Gear





Some additional information on how these are calculated:

When D is the diameter of the tire, the car moves forward a distance πD with each revolution of the tire. If there are F revolutions per unit of time, it moves forward at a speed of πD´F per unit of time. If D is in inches and F is in revolutions per minute (rpm), the above result will be in inches per minute. There are 63,360 inches in a mile and 60 minutes in an hour, so one inch per minute equals 60/63360 miles per hour or 1/1056 mph. So we have the following formula:

V(mph) = D(in) ´ F(rpm) ´ (π/1056)

In the automotive industry, the coefficient 1056/π is usually taken to be equal to 336 (exactly it is 336.1352398...) and the formula corresponding to the above is:

(mph)(gear ratio)(336) = (tire diameter in inches)(rpm)

With the above numerical approximation, both formulas are identical if we consider that (rpm)/(gear ratio) is the rate of rotation of the tires. So the "gear ratio" as the number of rotations of the driveshaft for each turn of the tire. This ratio is normally more than 1, except in overdrive gear. So, calling R the "gear ratio", your final answer is:

V(mph) = D(in) ´ F(rpm) ´ (π/1056) / R

or, approximately: V = (D ´ F) / (336 ´ R)

where V is the velocity (in mph), D the tire diameter (in inches), F the engine rpm, and R the gear ratio.

 


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