|Fuel consumption savings at different speeds. Click to enlarge.|
Ford UK has provided performance data illustrating the effect of driving a cross-section of its Transit van models at governed speeds of 60 and 65 mph as a means to demonstrate the utility of a low-cost (£25) road speed limiter (RSL) it offers on its lineup.
On a Transit 260 or 280S 2.2-liter low-roof van, for example, driving 60 mph rather than 70 mph could save more than 19% on fuel consumption at cruising speeds—alongside a similar percentage cut in CO2 emissions.
|CO2 reduction at different speeds. Click to enlarge.|
By limiting speeds to 65 mph, a saving of more than 10% at cruising speeds is possible on the same model, again with a corresponding 10%-plus reduction in CO2 emissions. On a higher-powered Transit Jumbo, a cruising speed saving of almost 13% is achievable by governing top speed at 60 mph instead of 70 mph.
Across all the models, a 10 mph reduction (60 vs 70) roughly doubles the percentage fuel savings provided with a 5 mph reduction.
Many operators have been asking us about achievable ways of limiting their impact on the environment as well as reducing costs. For operations on which maximum motorway speed is not a critical factor, we believe use of RSLs to be one of the most cost-effective approaches.—Kevin Griffin, Ford UK fleet operations director
The factory-fitted Ford Transit road speed limiter is an option on all diesel models.