The BMW New 420i Convertible, commonly referred to as an open car, features a retractable roof. Its low body and soft top create an exterior that attracts attention on the road. Despite its strong impression, the driving experience is smooth and stable. The external wind and noise are well blocked even at high speeds.
The New 420i Convertible is a partial modification model of the 4 Series released by BMW last year after a three-year hiatus. The 4 Series is a coupe and convertible lineup separate from BMW's flagship sedan, the 3 Series. I drove approximately 250 km in the high-performance trim, the BMW New 420i Convertible M Sport Pro Package, around Seoul and Gangwon Province.
The vehicle's exterior features a large kidney grille at the front, sharp headlights, and smooth two-door design, enhanced by a soft top that symbolizes open cars, which creates a strong presence. At first glance, the thin, fabric-like soft top is made up of several layers of insulation and material, making it quite sturdy.
When viewing the entire vehicle, the soft top, which has different colors and materials, can create a sense of disconnection, so the exterior's appeal is highlighted only when the soft top is fully opened. Opening and closing the soft top requires just one button. At speeds below 50 km/h, the roof disappears and can be completely covered again in 18 seconds.
As the space between the trunk and rear seats opens, the roof folds down, moving like a giant robot assembling and disassembling. The range of motion is quite wide, with virtually no noise or vibration. Simultaneously pressing the button brings up an instruction message on the display, making it easy for anyone to operate.
While there is a neck warmer function that blows warm air from the back of the neck, on a cold day, even a slight increase in speed felt fierce as the wind grazed the bare face.
Both initial acceleration and high-speed driving were smooth and cool. The vehicle is equipped with a BMW TwinPower Turbo four-cylinder gasoline engine that delivers a maximum output of 190 horsepower and a maximum torque of 31.6 kg·m, along with an 8-speed Steptronic automatic transmission. It takes 8.2 seconds to accelerate from a stop to 100 km/h.
The body adhered to the road, maintaining stability even on winding mountain roads without swaying or shaking. The heavy steering wheel promptly recognizes the driver's intended direction and adds a sense of ease during turns.
Contrary to the expectation that vehicles with a soft top would lack sound insulation and thermal retention, the interior was quiet and comfortable throughout the drive. Although its dynamic appearance seems suited for high-speed races, the quiet and comfortable ride became an unexpected charm. For one or two people, it appears sufficient for commuting.
The first row, with driver's and passenger's seats, is spacious and comfortable, but the second row and trunk space are cramped. The second row feels narrow, and due to its two-door design and low body, adults need to hunch down significantly to get in and out. Prices are 74.8 million won for the M Sport Package and 79 million won for the M Sport Pro Package, depending on the trim.