The BMW 4 Series Convertible line-up is set to gain a new entry-level model.
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The new BMW 420i Convertible will start proceedings for the drop-top mid-sizer, with pricing pegged at $87,000 plus on-road costs. That's $2300 less than the 420d version that currently kicks off the 4 Series Convertible range.

BMW had previously stated the Convertible line wouldn't mirror the Coupe and Gran Coupe lines with a base petrol version, but documents seen by CarAdvice suggest there's been a backflip from the Bavarian brand.

The 420i is powered by the same 2.0-litre four-cylinder turbo engine seen in the 428i, albeit detuned. Outputs are set at 135kW and 270Nm, with grunt sent to the rear wheels via a standard eight-speed automatic gearbox. Performance and fuel economy figures remain unknown, but we'd expect a 0-100km/h time of about 8.3 seconds, and fuel use of 6.4L/100km.

Specifications are likely to largely mirror those seen in the 420d (pictured), meaning 18-inch alloy wheels, bi-xenon headlights, front and rear parking sensors, a reverse-view camera and auto-dimming rear-view mirror will be standard, along with dual-zone climate control, electric sports seats with memory settings and leather upholstery.

The 420d features a six-speaker audio system paired with the Business navigation system and Bluetooth phone connectivity with audio steaming function, and it's likely the 420i will, too.

CarAdvice has contacted BMW Australia for comment on the new entry-level 4 Series Convertible.

Read our review of the BMW 4 Series Convertible.