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By contemporary standards, the Sprint was an exceptionally rapid car and quite lived up to its name. It embarrassed almost every other supercar at the time in terms of outright acceleration up to about 90 mph. This electrifying performance was accentuated by the brilliant handling and road holding, allied to the small size of the Elan, which meant that a well driven Elan on a dry road could outclass any other non-Lotus road car. I know I am biased, but read the contemporary road tests to get an idea of how well respected the Sprint was for its handling and performance.
 

Source
Date
Top Speed
(mph)
0 – 60 mph (secs)
0 – 100 mph
(secs)
Average Fuel Consumption
(mpg)
Lotus press release
Jan 71
N/A
5.9
15.9
N/A
Motor
Mar 71
121
6.7
20.3
22.2
Autosport
Mar 71
121
6.2
18.9
23-27
Car
Jun 71
122
6.6
19.0
23
Autocar
Jun 71
118
7.0
20.7
25.5
Lotus advert
Jun 71
N/A
6.2
20.1
N/A
Motoring News
Jul 71
118
7.3
21.0
24.2
Motor Sport
Jul 71
N/A
Approx 6.8
N/A
26
Car & Car Conversions
May 72
122
6.4
19.9
22-30
Car
Oct 72
123
6.6
19.0
30.5
Autosport
Feb 73
121
6.6
19.8
20-25

 
Reportedly, the 3.55:1 differential gave a top speed of around 130 mph. Lotus PR chief at the time Don McLaughlin recalls doing 134mph in Belgium, which dropped to 128 mph with the lights up.
 
A Sprint/5 owner has not found top speed affected, nor has another - on the flat, although he has had the speedo needle down to the ignition light downhill; an estimated 130 mph. This fits in with John Bolster's view of what an overdrive fifth gear would give an Elan.
 
Again, with the Sprint/5, touring fuel consumption can reach circa 38 mpg, and on one 600 mile trip - up to 42 mpg. This compares with a test figure of 30.5 mpg by "Motor" with their 4 speed Sprint.