When Mercedes revealed the Mercedes W17 on 22 January 2026, the team went into F1’s biggest rule change in history as many people’s favourites. After dominating from 2014 to 2021 and then struggling through the 2022–25 rules, the question was whether it could get back to the top. Eight months later, the answer is clear: Mercedes lead both championships, and 20-year-old Kimi Antonelli is 81 points clear with nine rounds to go (Formula 1).
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The Mercedes W17 Launch
Mercedes released digital images of the car on 22 January, then took it straight to Silverstone for its first run with both drivers (Wikipedia). It was built for a completely new set of rules: new chassis, new power units, narrower tyres and 100% sustainable fuel.
Key specs of the W17:
- Power unit: Mercedes-AMG F1 M17 E Performance
- Length / width: 5,505mm / 1,900mm
- Wheelbase: 3,400mm
- Minimum weight: 772kg (with driver)
- Drivers: George Russell (#63) and Kimi Antonelli (#12)
The Engine Row
Before the car had turned a wheel in anger, it was already controversial. Rivals believed Mercedes (and Red Bull) had found a way to exceed the 16:1 engine compression ratio once the engine was hot, while still passing the check, which was done at room temperature.
The FIA settled it with a compromise. From 1 June 2026, engines had to meet the 16:1 limit both at room temperature and at an oil temperature of 130°C (Motorsport.com). The timing, just before the Monaco Grand Prix, let Mercedes adapt with its second power unit of the season.
The rule change didn’t slow Mercedes down.
Why the 2026 Rules Suited Mercedes
The 2026 regulations were built around a new generation of power units. The complex MGU-H was scrapped, and electrical power was raised to about half of the car’s total output, running on fully sustainable fuel. That put engine departments at the centre of the competition.
That’s familiar territory for Mercedes. The last time F1 made a major engine change, in 2014, Mercedes’ power unit was the class of the field, and it went on to win eight straight constructors’ titles. The team’s engine base at Brixworth has spent years preparing for this reset, and the W17’s form suggests history is repeating itself.
The chassis rules changed too. Cars are shorter, narrower and lighter than their predecessors, which rewards teams that got the fundamentals right from the start rather than those developing an old concept.
How the W17 Has Performed
Mercedes have been the team to beat all season. Antonelli has won repeatedly, including an emotional home victory at Monza after starting from the back of the grid because of a power unit penalty (News.GP). Russell, fourth in 2025, is second in the standings.
It hasn’t been perfect. Antonelli retired from the lead in Barcelona with four laps left, handing Lewis Hamilton his first Ferrari win, and the team has admitted the W17 can be “fragile” (Grande Prêmio). Toto Wolff still won’t talk about the title.
The Mercedes W17 and Antonelli’s Rise
The W17’s success is also Kimi Antonelli’s breakthrough story. Mercedes picked the Italian teenager to replace Lewis Hamilton for 2025, a big gamble at the time. Within two seasons, he’s leading the world championship.
There’s an irony in that. Hamilton left Mercedes for Ferrari just as the team was building the car that would bring it back to the top. He’s still having a strong season, sitting third in the standings with his first Ferrari win, but the car he left behind is now the benchmark.
For Mercedes, a title with Antonelli would mean more than a trophy. It would show that the team can win again with a new generation of driver, in a new era of the sport.
Drivers’ Championship (as of 22 September 2026)
| Pos | Driver | Team | Points |
|---|---|---|---|
| 1 | Kimi Antonelli | Mercedes | 292 |
| 2 | George Russell | Mercedes | 211 |
| 3 | Lewis Hamilton | Ferrari | 191 |
Source: Formula 1
When Could Antonelli Win the Title?
The earliest Antonelli could win the title is Singapore (Round 17), but only with a perfect run while Russell scores nothing. A more realistic target is Mexico (Round 19). If he does it, Mercedes will have gone from also-rans to champions in the first year of the new rules, which is exactly what they aimed for when the W17 was revealed.
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Sources: Formula 1, Wikipedia: Mercedes W17, Motorsport.com, News.GP, Grande Prêmio.
