Which cars are most likely to pass their MoT test? The Honest John data

http://www.guardian.co.uk/news/datablog/2012/may/11/mot-tests-cars-honest-john

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Motoring advice specialists Honest John have today released a comprehensive data-set covering MoT tests taken by every model registered in 2008 across all manufacturers.

The Rolls-Royce Phantom comes out on top in terms of pass rate, with 93% of the 82 Phantoms tested over this period passing the test. At the other end of the spectrum, the Chrysler Grand Voyager has a pass rate of just 59%.

The majority of top-ranking models are at the luxury end of the market, with the Rolls-Royce joined by the Lamborghini Gallardo (92%), Bentley Continental GTC and Aston Martin DBS and Vantage (all 91%) in the top five.

Lexus and Porsche make the top ten with the LS and Cayman respectively, where they are joined by two more Bentleys and the highest ranking mid-market model in the shape of the Daihatsu Materia.

Chrysler's woes don't end with the Grand Voyager - the manufacturer is well represented in the lower reaches of Honest John's data. Three more of the seven lowest pass rates are held by Chryslers - they are the Voyager and PT Cruiser (both 65%) and the 300C (62%).

Geographically, cars tested in London fare best - the top five average pass rates by area belong to Romford, Bromley, Enfield, Ilford and Slough. The five lowest regional pass rates are those of Torquay, Truro, Kirkcaldy, Lerwick and Dundee. The figures show less than half of cars registered in 2008 and tested in Dundee pass their test.

Honest John have records of MoT pass rates going back to cars registered in 1980, and the table below shows an interesting pattern. The average pass rate across all models for whom data is held dropped steadily between 1980 and 1996, but has since risen fairly rapidly. The average rate bottomed out at around 46% but is now at its highest since Honest John began collecting data.

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Data summary

First MoT pass rates, by car model

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SOURCE: Honest John

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MoT Pass rate by area

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SOURCE: Honest John

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