Currently reading: Hennessey Venom F5 Revolution Roadster is world's fastest open-top

American company's new £2.4m convertible hypercar joins coupé track car in targeting lap records

Hennessey has revealed what it claims to be the fastest convertible ever created: a roofless variant of the stripped-out, track-focused 1817bhp Hennessey Venom F5 Revolution.

Called the Venom F5 Revolution Roadster, it takes the crown from the standard, road-going Venom F5 Roadster – which the firm says can achieve a top speed of over 300mph – as the world’s fastest open-top.

The limited-run $3 million (£2.4m) roofless Revolution track car – all 12 examples of which are already sold – arrives in the same year as the coupé track car, itself a stripped version of the standard record-breaking F5 Venom to further increase performance.

The Revolution Roadster offers an “unmatched visceral driving experience”, said founder Jon Hennessey, and like the $2.7m (£2.3m) coupé has been created to crush lap records. 

As such, the 'Fury' 6.6-litre V8 returns – with reworked cooling like the coupé track car – mid-mounted in the same carbonfibre tub. Power is sent to the rear wheels using the same seven-speed automatic gearbox, but this has now been calibrated for competitive use.

Hennessey venom f5 revolution roadster front bumper

With the Roadster, like its standard road-going namesake, the car has received a host of changes to keep it as competitive as the coupé. These are focused on generating more downforce, such as significantly larger front and rear splitters and dive planes on the front fascia. 

Another example is that top, which comes in the form of a removable carbonfibre panel to keep it as light as possible. Weighing just 18kg, the panel is secured with four quick-release bolts and two high-strength latches to withstand the hypercar’s “staggering acceleration capabilities and aerodynamic forces at extreme speed”, said the firm. Inside, it is lined in Alcantara upholstery pointing to the track car’s luxury positioning.

Hennessey also focused on stripping out the track-honed open-top, to make it, alongside its track sibling, the lightest Venom F5 variant yet. It weighs less than the 1360kg road-going models, although the firm wouldn’t confirm by how much or what was changed to make it lighter.

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Hennessey venom f5 revolution coupe interior

As a result, the American firm, noted for its speed-centric approach to car design, promises “phenomenal acceleration”. The Revolution Roadster will most likely go beyond the road car's 2.6sec 0-62mph time and could even push further than its claimed 300mph top speed.

Straight-line speed isn’t the only target for Revolution cars, however, with new aerodynamics fitted to send the car around tracks as quickly as possible. This is most visible in the adjustable full-width carbonfibre rear wing, which can deliver more than 363kg of downforce at 186mph and more than 635kg at 249mph. 

Double-wishbone suspension returns but now with more aggressive alignment settings and adjustable dampers.

Stopping power comes in the form of carbon-ceramic brakes – fitted as standard – that feature multi-piston calipers.

Hennessey venom f5 revolution coupe front three quarter static

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Inside, the same luxurious interior as seen across the rest of the range can be found, now with the addition of a real-time digital track telemetry system capable of measuring data such as lap times, splits and cornering g-forces.

The Revolution Roadster joins the Venom F5 Revolution (pictured above), Venom F5 coupé and Venom F5 Roadster as part of a four-car line-up.

Will Rimell

Will Rimell Autocar
Title: News editor

Will is Autocar's news editor.​ His focus is on setting Autocar's news agenda, interviewing top executives, reporting from car launches, and unearthing exclusives.

As part of his role, he also manages Autocar Business – the brand's B2B platform – and Haymarket's aftermarket publication CAT.

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sabre 10 January 2023

1817 hp are achieved by using Hennessy cognac for fuel and low viscosity Snake Venom No. 5 engine oil

jason_recliner 9 January 2023

SUPERB. ICE is going on with a BANG!!!

ValerieBlakely 9 January 2023

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martin_66 9 January 2023

Oh Valerie.  Such a shame.  You clearly aren't earning $88 an hour for your understanding of English grammar.  If you really want to scam us, please go to school and learn how to speak English like the rest of us do.  Oh, and one more thing - people in the UK earn pounds, not dollars.

sabre 10 January 2023

I gather Valerie's job requires no proper English Grammer. I have tried several times to convice Autocar to erase all ads and other non automotive comments in these pages, but failed. It should be Autocar policy for the readers' benefit. 

If now Autocar erases the unnecessary comments, including mine, it will be a good practice for the future.

martin_66 10 January 2023

Spot on mate.  How hard can it be for someone at Autocar to check all the comments maybe once an hour and remove the spam?  There aren't that many articles to go through.  It's just ridiculous.  Still, $88 an hour does sound appealing.  I just wouldn't want to have to work in a scam centre in Kolkata to get it!