Tesla Model 3 Performance real-world highway efficiency test: what happens when you drive the quickest Model 3 gently?
I took the fastest Model 3 from Tesla Center Timișoara onto a Romanian motorway, at 130 and 120 km/h (about 80 and 75 mph), with my family on board. It used 210 Wh/km (about 338 Wh/mi) on the way out and 189.6 Wh/km (about 305 Wh/mi) on the way back.
Most people think of the Tesla Model 3 Performance as a supercar-quick sedan, not an efficient one. I wanted to test the opposite: how much energy it uses when you drive it the way a normal person drives on the highway, in Chill mode, with the climate control on and the family on board. I picked it up from Tesla Center Timișoara in western Romania and drove the A1 motorway to Arad at 130 km/h (about 80 mph), then back at 120 km/h (about 75 mph). The result: 210 Wh/km (about 338 Wh/mi) on the way out and 189.6 Wh/km (about 305 Wh/mi) on the way back, roughly 21 and 19 kWh per 100 km.
The car I tested
This was a 2026 Model 3 Performance from the Highland generation, on 20-inch wheels with wide, low-profile tires (275 mm at the rear). From what I could see, the newer car also has a front bumper camera, and the battery might be slightly larger, but Tesla doesn't say much about which battery each batch gets, so treat that as my personal impression.
For the European version, built in Shanghai, Tesla announced 460 hp (338 kW), 0–100 km/h in 3.1 seconds, a 262 km/h top speed, up to 250 kW Supercharging and up to 528 km (about 328 miles) of WLTP range when the Highland Performance launched. It was also the first Model 3 with adaptive dampers and a lowered suspension. German outlet "AutoScout24" estimates usable battery capacity at around 75 kWh. Keep in mind that WLTP figures are more optimistic than US EPA ratings, and US-built cars have slightly different specs.
How I ran the test
I left Timișoara and joined the motorway toward Arad, resetting the trip computer only once I was on the motorway so I'd measure steady cruising. There were two adults, a child and a sleeping baby on board, all buckled up. It was 16–19 °C (61–66 °F) outside, with automatic climate control set to 22 °C (72 °F).
I set the cruise control to 130 km/h, but the car settled at 129, just like other new Teslas I've driven. I stayed in Chill mode the whole time, because that's how most people drive on the highway. Full power is no use at 80 mph, except maybe on the unrestricted stretches of the German Autobahn.
One detail matters: there's an elevation difference of about 27 meters (90 feet) between Timișoara and Arad. Arad sits slightly higher, so the outbound leg is a very gentle climb and the return leg a very gentle descent.
The results, out and back
| Direction | Cruising speed | Distance | Time | Final consumption |
|---|---|---|---|---|
| Timișoara to Arad | 129–130 km/h (80 mph) | ~41 km (25 mi) | ~20 min | 210 Wh/km (~338 Wh/mi) |
| Arad to Timișoara | 120 km/h (75 mph) | ~40 km (25 mi) | 20 min | 189.6 Wh/km (~305 Wh/mi) |
At 130 km/h, with the slight climb and trucks slowing me down now and then, I finished at 210 Wh/km. On the way back, at 120 km/h and slightly downhill, consumption kept dropping: 204.5 Wh/km after 8 minutes and 16 km, and 189.6 Wh/km at the end.
To put that in context: using the roughly 75 kWh usable estimated by "AutoScout24", that works out to about 350–400 km (220–250 miles) of highway driving from 100% to 0% in the conditions of my test. On a real trip, charging between 10 and 80%, it's more practical to plan legs of about 200–250 km (125–155 miles).
Driver assistance: it changes lanes on its own
This car had Enhanced Autopilot, which changes lanes by itself. You just signal and rest a hand lightly on the wheel, and the car does the whole move. It also suggested lane changes when slower traffic was ahead and prepared me for the motorway exit a few hundred meters in advance. After the exit, it kept driving on Autopilot, but stopped suggesting lane changes.
Comfort: forget the stiff-suspension myth
The suspension impressed me. On the motorway it never felt harsh, even on 20-inch wheels, and switching from Standard to Sport didn't make it feel much firmer. The only downside I noticed was tire roar from the very wide tires, a bit more than I expected.
What it means for drivers
If you want a Model 3 Performance but worry it will be an energy hog, my test shows that driven normally it stays reasonable: about 19–21 kWh per 100 km (roughly 305–340 Wh/mi) at 75–80 mph, with four people on board and the climate on. The extra power only costs energy when you use it. The gap between 120 and 130 km/h was noticeable here, but part of it also comes from the gentle downhill on the way back and from traffic. And if comfort matters to you, the adaptive suspension makes this car far more civilized than its reputation suggests.
I ran a similar test on the same route with the Model Y: Tesla Model Y Long Range RWD real-world highway efficiency.
