Tyre Circumference = 1992.71 mm 1st Gear = 57.44 km/h - 35.61 mph 2nd Gear = 84.24 km/h - 52.23 mph 3rd Gear = 108.31 km/h - 67.16 mph 4th Gear = 189.55 km/h - 117.52 mph You can calculate the average speed using [math] speed = \frac{distance}{time \:\:taken}[/math]. Torque is a rotational force generated by the electrical system, whereas, the horsepower is an imperial unit of power equal to 745.7 watts. Horsepower is a unit of measurement of power developed by engineer James Watt in the late 18 th century. Enter your values: Torque: Pound-Foot Speed: Revolution Per Minute Result: Rotating Horsepower: Horsepower: Calculate Torque from Horsepower. You will be using the formula (RPM x T)/5252=HP, where RPM is the engine speed, T is the torque, and 5,252 is radians per second. The stock 93 RX-7 was rated at 255 HP at the flywheel and had a top speed of 158. Horsepower. Intro. Most of the web top speed calculators use engine (maximum rev), transmission (gear ratios) and tire (sizes) data to calculate a so called “theoretical maximum speed”. Enter your search terms Submit search form : Web: www.calculatoredge.com: Calculate Rotating Horsepower. Although its original purpose was to compare the output of steam engines with the power of horses (hence its name), it has since been adopted as a unit of measurement for all sorts of engines used to power things such as vehicles, lawn mowers, boats, chainsaw, and airplanes. Step 3: Multiply the torque value by the speed values of the engine. Torque - Horsepower (hp) conversion is a method of converting one unit from other and vice versa. Without knowing any more we can't calculate things like instantaneous speed or the maximum speed. A car's top speed is affected by many things. Calculate Speed from Horsepower. This calculator estimates your top speed when horsepower is added. Higher temperature, humidity or altitude will lower power output and decrease top speed. ¼ Mile Horsepower Calculator: MPH: Weight : HP : Enter the MPH and Weight and Click on Calculate... HP = Weight * (MPH / 234) ^3 Step 2: In the owner’s manual, look up the engine’s speed values.