1955 Lotus 9


1955 Lotus 9

 

The first car built with regard to aerodynamics at Lotus was the 9. Its strange body was the work of Mike Costin who designed a fully enveloped body which could be described as streamlined. The chassis was designed to accept a multitude of engines from the MG unit to a more potent Coventry Climax FWA.

As fitted with a Coventry Climax FWA, Colin Chapman and Ron Flockhart drove a Lotus Mk9 at the 1955 24 Hours of Le Mans. After 99 laps they were black flagged for going the wrong way on the course. Because of this sole effort many cars with the Coventry Climax engine are called ‘Le Mans.’

1955 Lotus 9

In Detail

typeRacing Car
built atEngland
engineersColin Chapman
production24
succeccesor1956 Lotus 11
engineCoventry Climax FWA Inline-4
positionFront, Longitudinal
aspirationNatural
fuel feedTwin SU Carburettors
displacement1098 cc / 67.00 in³
bore72.4 mm / 2.9 in
stroke66.6 mm / 2.6 in
compression9.8:1
power53.7 kw / 72 bhp @ 6100 rpm
specific output65.57 bhp per litre
bhp/weight171.43 bhp per tonne
body / frameAluminum Body over Steel Spaceframe
driven wheelsRWD
front brakesDiscs
rear brakesInboard Discs
f suspensionSwing Axles w/Coil over Dampers
r suspensionde Dion Tube Axle w/Coil over Dampers
curb weight420 kg / 926 lbs
wheelbase2222 mm / 87.5 in
front track1232 mm / 48.5 in
rear track1207 mm / 47.5 in
length3607 mm / 142.0 in
width1422 mm / 56.0 in
height851 mm / 33.5 in
transmissionMG 4-Speed Manual
top speed~205.95 kph / 128 mph
0 – 60 mph~7.8 seconds