The Lotus 27 was a Formula Junior version of the Lotus 25 Formula One car for the 1963 Formula Junior season.

Its body was aluminium monocoque with steel bulkheads.

[1] It was originally designed with fibreglass sides which led to flexing problems, leading to them being replaced with aluminium.

The Team Lotus cars were run by Ron Harris; and Peter Arundell won the 1963 British championship after the initial flexing problems were solved.

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