Arias Pistons 12.5:1 Compression 82mm Bore Honda B-series on 2040-parts.com

Mazda MX-5 1989-2014 in pictures: 25 years of everyone's favourite roadster

It's hard to believe but the Mazda MX-5 celebrates its 25th birthday this year, writes Adam Binnie. The occasion will be marked with a special edition model, before the launch of the fourth-iteration MX-5 in September 2014. The MX-5 earned the title of 'bestselling two-seater sports car of all time' from Guinness World Records in May 2000, after global production reached 531,890 units.

McLaren P1 sales will double turnover and quadruple profit in 2014 for McLaren

The McLaren P1 (pictured) boosts McLaren’s profits We’re starting to see the McLaren P1 – McLaren’s modern replacement for the iconic McLaren P1 – rolling out to lucky owners, and that will continue apace during 2014. Which means McLaren will see a big rise in its turnover and an even bigger rise in profits – up four-fold – as the £866,000 P1 replenishes McLaren’s bank account. But, although it will take a while to build, deliver and get paid for all 375 P1s, the P1 won’t be a long-term cash cow for McLaren, just a nice little booster as it starts to plan to up production to 4,500 cars a year over the next few years.

Diesel joins Porsche Panamera lineup

Porsche has put forward some eye-catching fuel-economy figures for the Panamera diesel--although we may never see the car in the United States. Set to go on sale across Europe in August, the four-door is claimed to return a combined city/highway driving fuel economy of 36.2 mpg in standard guise under European testing procedures. When fitted with optional low-rolling-resistance tires, the fuel economy climbs to 37.3 mpg on the European test--a figure that gives the Panamera diesel a theoretical range of 800 miles on its 21-gallon fuel tank.