"P13 will take sales from competitors but it will also grow the total market," Mr Flewitt said, adding that the new car will borrow technology and parts from McLaren's £195,000 650S model.
McLaren also plans a future model priced at about £350,000, designed to fit between the P1, which is a car limited to 375 vehicles that can go from 0 to 100km in 2.8 seconds, and the 650S.
The company, which was spun out of the McLaren Formula 1 team in 2009, expects to increase its profits in 2014, according to Mr Flewitt, and will increase investment in research and development to £80m, from £70m last year.
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McLaren will increase its headcount by 20 per cent to 1,500 by the end of 2015, mainly in the UK.
McLaren is one of a clutch of high-end British carmakers whose fortunes have risen in recent years thanks to huge overseas demand for their models, alongside the likes of Jaguar Land Rover, BMW's Mini and Bentley.
McLaren exports 92 per cent of its production. The company had just over 50 dealerships in January, will have 72 by the end of the year and more than 100 by 2018, with the bulk of the additions in Asia, a fertile market for high-end carmakers.