By Paul Hudson Last Updated: 10:40PM GMT 21 Jan 2009  The Cayman coupe has received similar engine revisions to the Boxster, although each version develops 10bhp more than in the equivalent roadster. The entry-level Cayman's 2.9-litre flat-six develops 265bhp, an increase of 20bhp over the previous 2.7-litre unit, while the Cayman S has a 3.4-litre engine with direct fuel injection and delivers 320bhp, an increase of 25bhp. Porsche says the superior output of the Cayman highlights its harder-edged appeal.  For example, the Cayman S with PDK seven-speed, double clutch automatic transmission and Launch Control (featured in the optional Sports Chrono Package Plus) accelerates from 0-62mph in 4.9 seconds. The PDK transmission is a £1,920 option.  Like the convertible Boxster, the new Cayman is available in standard or more powerful S versions. The 2.7-litre Cayman has a top speed of 165mph, with 0-62mph in 5.8sec, an EU Combined fuel consumption of 30.1mpg and EU Urban 20.5mpg, with CO2 emissions of 221g/km (PDK 163mph, 5.7sec, 31mpg, 20.8mpg and 214g/km).  Manual versions of the Cayman S have a top speed of 172mph, with 0-62mph in 5.2sec. Their official EU Combined fuel consumption is 29.7mpg (Urban 20.8mpg), with CO2 emissions of 223g/km. Equivalent figures for the PDK-equipped Cayman S are 171mph, 5.1sec, 30.1mpg, 20.0mpg and 221g/km.  Also like the Boxster, every Cayman now sits in Band F for Vehicle Excise Duty and company car taxation purposes.  In true Porsche tradition, the styling of the two-seater coupe has evolved subtly, featuring as it does a reworked nose and tail incorporating halogen headlights with integral indicators at the front and LED lights at the rear. Where the Boxster has square foglamps, the Cayman gets round ones.  The rear hatch provides up to 260 litres of luggage space (an additional 150 litres is available under the bonnet).  Driving dynamics are further improved by modifications to the steering and an optional limited-slip differential. The 18in and 19in wheels are larger than before, partly to accommodate a new braking system on S models.  The Porsche-Doppelkupplungsgetriebe (PDK) transmission provides faster gearchanges, improved economy and lower emissions than versions with the standard manual six-speed gearbox. See Porsche Boxster: on sale now for a detailed description of how the system works.  The seven-speed PDK shifts gears up to 60 per cent faster than a conventional automatic transmission and gives the new Cayman even better performance. Those in search of optimum driving dynamics have the option to combine PDK with Sport Chrono Package Plus, now featuring Launch Control.  We like: Terrific improvement to Porsche's baby supercar. Great engine with more performance and economy, brilliant twin-clutch PDK transmission.  We don't like: Fiddly gear-change buttons on the steering wheel, uncomfortable race-style seats.
Porsche's sharp-toothed coupe gets the same revisions as its Boxster sister,    including more power with greater efficiency.