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SPEED per 1000RPM figures
These road speed/rpm figures listed below are for 4th gear 1:1 direct drive (all Standard, Sport & RS Escort and Sierra Type 9 gearboxes) and 5th gear (Escorts fitted with Sierra Type 9 gearboxes only), These figures have also been calculated for wheels and tyres of the following sizes only, 185/60x13 and 175/70x13 tyre sizes, and fitted with either 4.125, 3.89, 3.77, 3.54 diff ratio's.
5th gear RPM/Road Speed on 185/60x13 tyres
3.89 diff
5th gear RPM/Road Speed on 185/60x13 tyres
3.77 diff
5th gear RPM/Road Speed on 185/60x13 tyres
B) 4th gear RPM/Road Speed on 175/70x13 tyres
5th gear RPM/Road Speed on 175/70x13 tyres
3.54 diff
5th gear RPM/Road Speed on 175/70x13 tyres
B) 4th gear RPM/Road Speed on 185/60x13 tyres
5th gear RPM/Road Speed on 175/70x13 tyres
4th gear RPM/Road Speed on 185/60x13 tyres
1000rpm=15.1mph, 2000rpm=30.2mph, 3000rpm=45.3mph, 4000rpm=60.4mph, 5000rpm=75.5mph, 6000rpm=90.6mph, 7000rpm=105.7mph
1000rpm=18.9mph, 2000rpm=37.7mph, 3000rpm=56.6mph, 4000rpm=75.5mph, 5000rpm=94.4mph, 6000rpm=113.2mph, 7000rpm=132.1mph
4th gear RPM/Road Speed on 185/60x13 tyres
1000rpm=16mph, 2000rpm=32mph, 3000rpm=48mph, 4000rpm=64mph, 5000rpm=80mph, 6000rpm=96.1mph, 7000rpm=112.1mph
1000rpm=20mph, 2000rpm=40mph, 3000rpm=60mph, 4000rpm=80mph, 5000rpm=100mph, 6000rpm=120mph, 7000rpm=140mph
A) 4th gear RPM/Road Speed on 185/60x13 tyres
1000rpm=16.5mph, 2000rpm=33mph, 3000rpm=49.6mph, 4000rpm=66.1mph, 5000rpm=82.6mph, 6000rpm=99.1mph, 7000rpm=115.6mph
1000rpm=20.6mph, 2000rpm=41.3mph, 3000rpm=61.9mph, 4000rpm=82.6mph, 5000rpm=103.2mph, 6000rpm=123.9mph, 7000rpm=144.5mph
1000rpm=17.1mph, 2000rpm=34.2mph, 3000rpm=51.3mph, 4000rpm=68.4mph, 5000rpm=85.6mph, 6000rpm=102.7mph, 7000rpm=119.8mph
1000rpm=21.4mph, 2000rpm=42.8mph, 3000rpm=64.2mph, 4000rpm=85.6mph, 5000rpm=106.9mph, 6000rpm=128.3mph, 7000rpm=149.7mph
A) 4th gear RPM/Road Speed on 175/70x13 tyres
1000rpm=18.2mph, 2000rpm=36.4mph, 3000rpm=54.7mph, 4000rpm =72.9mph, 5000rpm=91.1mph, 6000rpm=109.3mph, 7000rpm=127.6mph
1000rpm=22.8mph, 2000rpm=45.6, 3000rpm=68.3, 4000rpm=91.1mph, 5000rpm=113.9mph, 6000rpm=136.7mph, 7000rpm=159.5mph
1000rpm=17.6mph, 2000rpm=35.2mph, 3000rpm=52.8mph, 4000rpm=70.4mph, 5000rpm=88.0mph, 6000rpm=105.6mph, 7000rpm=123.1mph
1000rpm=22mph, 2000rpm=44mph, 3000rpm=66mph, 4000rpm=88mph, 5000rpm=109.9mph, 6000rpm=131.9mph, 7000rpm=153.9mph
Dave`s RS GARAGE, WWW.RS-GARAGE.CO.UK
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