Renault quietly delivered a revealing electric-car demonstration at the UTAC test track in Morocco. It’s an experimental aerodynamic EV test car, the Filante Record 2025, which completed more than 1,000 kilometers on a single charge with a standard 87 kWh EV battery while maintaining an average speed of just over 100 km/h.

The distance is impressive, but the real story lies in the energy used: roughly 7.8 kWh per 100 kilometers. At highway speed, that figure is extraordinary, not because it breaks every EV record ever set, but because it exposes how far today’s everyday electric cars still are from actual efficiency needing double that.

At the start of 2025, Renault set itself a clear challenge: to drive an electric car more than 1,000 kilometers on a single charge, using a battery no larger than that of the Scenic, and at realistic motorway speeds. After the first attempt was abandoned in October due to adverse weather, the team finally succeeded on 18 December.

The result was notable: more than a thousand kilometers on a single charge at an average speed of just over 100 km/h, with energy consumption of around 7.8 kWh per 100 km. That is not merely a headline number; it highlights the extent of energy savings achievable through advanced aerodynamics and efficiency design.

Half of the energy used by an average EV

To put that figure in context, consider the Renault Scenic E‑Tech electric, equipped with the same 87-kWh usable battery pack.

According to Renault’s WLTP cycle data for the Scenic E-Tech electric Long Range (87 kWh), the combined energy consumption is around 17.0–17.4 kWh per 100 km with a corresponding range of roughly 600-625 km on the WLTP test cycle.

These WLTP values are measured under standardized test conditions that include a mix of urban, suburban, and highway driving, with temperature control systems off or set to a prescribed level.

In real-world driving and official metrics, this larger, family-oriented SUV consumes around 17-18 kWh per 100 km under typical conditions, including motorway stretches.

On an extended highway cruise at 110 km/h, consumption can increase further, with estimates of roughly 19-23 kWh per 100 km depending on weather, speed, and climate-control use. Even under ideal conditions, the Scenic’s energy use at sustained speeds is more than double the Filante’s measured figure.

Aerodynamic penalty

That efficiency gap underscores a core issue in today’s EV design: the popularity of tall, heavy electric SUVs – including models such as the Renault Scenic E-Tech – incurs an inherent aerodynamic penalty, making them far less efficient at motorway speeds than physics would allow.

Above roughly 80 km/h, aerodynamic drag becomes the dominant energy load. Because production cars must balance practicality, comfort, safety, and style, they inevitably devote less design to minimising drag and mass than a purpose-built prototype.

The Filante, by contrast, sheds all extraneous mass and surface area to expose the core physics of highway efficiency, maintaining a constant speed under controlled conditions to isolate its performance.

Real drivers will never cruise for hours at a fixed speed without interruptions, so results from any steady-speed test should not be taken as literal predictions of everyday range.

Yet the comparison stands as a benchmark for what is possible if efficiency were prioritised more aggressively in real-world EV design. At motorway speeds, the energy cost of pushing air aside is what kills range, and the Filante’s dramatic advantage over a large SUV like the Scenic underscores how much room for improvement still exists in mainstream electric cars.

Potential efficiency

Seen this way, Renault’s Filante record is not merely a technical stunt; it is a reminder that current EVs still sacrifice a great deal of potential efficiency for comfort and practicality — and that there is a substantial gap between what is possible and what drivers typically experience on long highway journeys.

The Filante Record 2025 was conceived as both a technical tool and a symbolic object. Its aircraft-inspired shape and ultraviolet-blue finish deliberately reference Renault’s history of record cars, notably the 40 CV des Records of 1925 and the Étoile Filante of 1956, while projecting that heritage into an electric future.

The single guiding principle behind its design was absolute efficiency. Everything, from the fighter-jet-style cockpit bubble and Formula 1-like driving position to the extreme focus on aerodynamics, serves the sole purpose of minimising energy consumption at speed.

That philosophy translated into a relentless optimisation process. Wind-tunnel testing led engineers to reshape wheel fairings, reduce air inlets, and refine airflow around mechanical components.

At the same time, ultra-light materials such as carbon fibre and 3D-printed aluminium were used only where structurally necessary. Advanced steer-by-wire and brake-by-wire systems further reduced weight and freed up design possibilities, while bespoke Michelin tyres minimised rolling resistance.

The result is not a prototype for production, but a rolling laboratory, one that demonstrates how far efficiency can be pushed when every design decision is subordinated to the physics of moving efficiently through the air at motorway speed.