Currently reading: Renault 4 Plein Sud review: does folding roof add extra charm?

Retro-themed EV crossover gains unusual convertible roof – without any compromise

Renault is making quite a big deal of its 4 Plein Sud - a convertible version of its best-selling B-segment electric SUV

I'm in the dramatic Catalonian mountains for a couple of days to drive the new cabrio – a real pleasure and the perfect place to enjoy top-down motoring. 

Except the big deal feels a little overblown, because the Plein Sud (which roughly translates to 'due south') has more of a fabric roll-back sunroof, like previous generations of Twingo offered, than a true retractable roof. 

That’s not necessarily a criticism, of anything other than the marketing at least, because unlike in the Mini Convertible (with a completely folding roof) or the Fiat 500e Cabrio (which leaves the doors and pillars in place but folds the fabric all the way back to the rear deck) there is still a hatchback for the boot and the same 420 litres of cargo space as in the normal 4.  

It's a similar uncompromising story in the three back seats. Head room remains good unless you’re really tall. It’s not infinite, because the 80x92cm opening stops roughly where your knees are. Speaking of knees, room for those is unchanged, so there’s plenty if you’re of an average build, although you won't be able to stick your feet under the front seats if they’re in a lowered position. 

It's from the back (with Isofix mountings for two child seats) that you get the most effect from the open roof: a great view of the sky, wind in your hair and buffeting that doesn’t really begin until A-road speeds. I can imagine kids absolutely loving it back there; I know I did. 

Up front, you do miss out on some of the fun, because unless you look behind you, it really does just feel like an open sunroof. That won’t be a problem for many, because even at motorway speeds all remains reasonably calm, especially with the roof in its half-open position. 

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Elsewhere, the 4 experience is very much unchanged. The quality of materials is great for the price point, the seats are comfortable even over long distances and the touchscreen is easy to use and complemented by lots of buttons. 

Apart from a retro-cool folded-up fabric pile on the roof, the 4's exterior is unchanged, and 18 months later it still makes an impression that rivals can’t match.

The new roof has added 19kg of weight, but I couldn’t tell a difference on the road. The steering is still sweet, the ride comfortable and the performance adequate.

My test car returned 4.4mpkWh with the roof open on a warm day, suggesting 228 miles on a charge should be achievable. 

Renault says this is the only five-seat electric convertible on the market, which if you’re generous enough to call it a convertible is true. There are only three other electric rag-tops: the four-seat, £27k 500e Cabrio, with 190 miles of range and a fairly cramped interior; the £182k Maserati Grancabrio Folgore, with four seats and 279 miles of range; and the £55k MG Cyberster, with two seats and 316 miles of range. 

That makes the Plein Sud, at £27,500 in the lower of its two very well-specced trims, look like quite the bargain, and its 242-mile official WTLP range is only three down on the tin-top (Renault estimates that efficiency is roughly a further 5% worse with the roof down). 

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In reality, customers are more likely to look at the Plein Sud as a nice-to-have £1500 option than an electric alternative to the Mini Convertible or Volkswagen T-Roc Cabriolet, but that's just fine.

Without altering the fundamentals of what makes the 4 great, Renault has instilled a sense of fun and a little wind in the hair for next to no compromise, all for the price of a small sunroof on rivals. If I were buying a 4, it would be a no-brainer. 

The next question to ask is: when are the 5 and Twingo getting the same thing?

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Alex Wolstenholme

Alex Wolstenholme
Title: Editorial Assistant

Alex joined Haymarket, the publisher of Autocar, in 2023. A car fanatic, he loves to delve into the spec-sheet, especially when it concerns something obscure or quirky. He currently drives a 2007 Alpina D3 estate and a 2004 Alpina Roadster S. 

In his current position, as an editorial assistant, Alex mainly assists in managing Autocar's presence online, but also writes features and reviews for the magazine.