2014 BMW 420d Convertible Review: Efficient Grand Tourer

The 2014 BMW 420d Convertible stands out as a premium four-seat drop-top that prioritizes effortless long-distance cruising over outright track-day thrills. Powered by a punchy 2.0-liter turbodiesel delivering 181-184 horsepower and substantial low-end torque, it accelerates from 0-62mph in around 8.2-8.4 seconds while promising impressive fuel economy figures up to 53mpg combined. This model trades some of the coupe’s razor-sharp handling for enhanced ride comfort and roof-up refinement, making it a compelling choice for summer drives and relaxed motorway runs.

Powertrain and Performance Breakdown

At the heart of the 420d Convertible lies BMW’s efficient 2.0-liter four-cylinder turbodiesel engine, producing between 181bhp and 184hp at 4,000rpm, paired with 380Nm of torque available from 1,750-2,750rpm. This setup propels the 1,680kg cabriolet to 62mph in 8.2 seconds (official) or 8.38 seconds in real-world tests, with a top speed capped at 146mph. While not as explosive as petrol variants like the 435i, the diesel’s thick mid-range pull makes it deceptively quick, especially beyond 2,000rpm where it revs willingly to 4,000rpm and higher.

Transmission options include a slick eight-speed automatic or a well-judged manual, both enhancing the car’s smooth progression. In ECO Pro mode, fuel consumption drops to as low as 5.2L/100km (around 54mpg), rising to 7.8L/100km (36mpg) under enthusiastic driving, with CO2 emissions at 138g/km. The engine can feel slightly vocal under hard acceleration, but it’s hushed during normal cruising.

Retractable Hardtop: Engineering for All-Weather Versatility

BMW’s three-piece folding hardtop is a highlight, deploying or stowing in about 20 seconds at speeds up to 11mph, folding neatly into the boot. When raised, it delivers coupe-like quietness with a 2dB noise reduction over predecessors, thanks to enhanced insulation and a noise-absorbent headliner. Roof-down, the cabin remains draft-free with windows up and an optional wind deflector, enabling serene motorway blasts even at highway speeds.

This system underscores the 420d’s role as a true four-season convertible, maintaining structural integrity with 40% more torsional stiffness than the prior 3 Series drop-top, minimizing shudders over rough roads. The boot loses space with the roof folded but remains practical for weekend getaways.

Driving Dynamics: Cruiser Over Corner-Carver

While the 4 Series Convertible boasts quick, accurate steering with useful feedback, it prioritizes composure over the coupe’s agility. The body exhibits mild roll in bends, and steering lacks the final edge of BMW’s fixed-roof models, leading to understeer when pushed. In Sport+ mode, the rear can step out playfully on smooth surfaces, adding character, but raggedness emerges on tighter, bumpier roads.

Suspension tuning delivers a supple ride around town and over imperfections, excelling as a sport tourer with 18-inch run-flat tires providing ample grip. Adaptive options further refine this, erasing road harshness while boosting stability. Overall, it’s balanced for luxury driving, not circuit heroics.

• Strengths: Supple ride, stable highway manners, playful tail in Sport mode.
• Limitations: Noticeable roll, less precise than coupe, tire-sensitive on rough twisties.

Interior Comfort and Premium Features

The cabin mirrors the coupe’s high-quality layout, with integrated seatbelts, optional neck warmers, and heated seats as standard on many trims. Entry SE models include parking sensors, cruise control, dual-zone climate, and a 6.5-inch infotainment screen, while Luxury Line adds stylish wheels and further luxuries. Materials feel upscale, and space accommodates four adults reasonably, though rear headroom suffers roof-up.

Refinement shines: engine noise is minimal except under boost, wind intrusion is low, and the ride cossets over broken surfaces. It’s a relaxing cruiser with a feel-good factor for long hauls.

Design and Styling Appeal

With the top stowed, the 4 Series Convertible’s long, low profile is accentuated by continuous brightwork from A-pillar to A-pillar, enhancing its elegant lines. It’s more stylish than its 3 Series predecessor, blending sporty coupe cues with open-top allure. The design ages gracefully, appealing to buyers seeking understated luxury.

Safety and Practicality Considerations

Standard safety kit includes stability control, multiple airbags, and parking aids. The reinforced chassis improves crash protection, and run-flat tires reduce roadside vulnerabilities. Practicality suits couples or small families, with decent luggage space roof-up, though the folding mechanism slightly compromises boot capacity.

Pros and Cons at a Glance

Who Should Buy the 2014 BMW 420d Convertible?

This model suits drivers prioritizing diesel economy, open-air freedom, and grand touring comfort over raw handling. It’s ideal for motorway miles, coastal cruises, and style-conscious commuters who value refinement. Enthusiasts seeking sharper dynamics may prefer the coupe or rivals like the Audi A5.

Frequently Asked Questions (FAQs)

In summary, the 2014 BMW 420d Convertible excels as a luxurious, efficient drop-top for relaxed adventures, blending diesel thrift with open-top joy.