2008–2010 BMW 1 Series 135i Cabrio Specs & Performance

The 2008–2010 BMW 135i Cabrio is a compact convertible powered by a 3.0-liter bi-turbo inline-six gasoline engine producing 302 hp and 295 lb-ft of torque. The N54B30 engine uses a DOHC 24-valve configuration with direct injection, with peak power arriving at 5,800 rpm and peak torque at 1,300 rpm. Its rear-wheel-drive layout can be paired with either a 6-speed manual or 6-speed automatic transmission. With a 3,693-pound curb weight and a 12.24 lb/hp power-to-weight ratio, the 135i Cabrio accelerates from 0 to 60 mph in 5.4 seconds and reaches a top speed of 155 mph.

The BMW 135i Cabrio combines its performance-focused drivetrain with a four-seat open-air cabin and 10.8 ft³ of luggage space. It measures 171.7 inches long, 68.8 inches wide, and 55.6 inches high, with a 104.7-inch wheelbase and a 14-gallon fuel tank. MacPherson struts at the front and multi-link suspension at the rear are supported by vented disc brakes, with 215/40 ZR18 front and 245/35 ZR18 rear tires. AutoSpecsHub lists combined fuel economy at 25.1 mpg, highway economy at 33.1 mpg, a total range of 350 miles, and tailpipe CO2 emissions of 360 g/mile. Compared with the 135i Coupé, the Cabrio retains the same 302-hp and 295-lb-ft output but adds a convertible body style, while its 3,693-pound weight and 10.8 ft³ luggage capacity reflect the additional open-top hardware.