George Russell's Mercedes during first practice at the 2025 Singapore Grand Prix. Photo: Liauzh / Wikimedia Commons, CC BY-SA 4.0
George Russell has already served one 40-place grid penalty this month, and Mercedes got nothing faster for it. The power unit hardware bolted into the No. 63 W17 in Singapore was a replacement for the unit that quit at Sepang, not the upgrade Mercedes earned through the FIA’s catch-up scheme. That upgrade is still sitting on the shelf, and the 2026 rules make it close to certain that fitting it will cost Russell a second trip to the back of the grid before the season ends.
Mercedes has not publicly confirmed when the new specification will race. Run the remaining calendar through the regulations, though, and Las Vegas is where the numbers point. The more interesting question is what the penalty is now worth paying for, because it is no longer the drivers’ title.
Singapore spent the allocation, not the upgrade
Russell’s Sepang race, run as the relocated Bahrain Grand Prix on October 4, ended after 49 of 55 laps. Mercedes described it as a suspected power unit issue, and it cost him what Formula 1’s own estimate puts at 15 points from third place. It was the latest in a run of reliability problems that also included a battery failure in Canada.
The bill landed in Singapore. The FIA’s element list for the event shows Russell taking his fifth internal combustion engine, fifth turbocharger, fifth exhaust set and fourth MGU-K. The 2026 allocation is four of each of the first three and three MGU-Ks, so all four parts were over the limit. The stewards applied 10 places per element for a 40-place drop. Under Article B2.5.4b.iv of the Sporting Regulations, any driver carrying more than 15 places of grid penalties starts behind everyone else, so the exact total stopped mattering after the second element.
Russell started 19th, worked forward to ninth and took two points. Toto Wolff called it a race “we knew was about damage limitation,” and that was accurate. Singapore is a poor place to start from the back, and the weekend had already turned on the sprint, where Russell took the lead from Max Verstappen at the start and then clipped the final-corner kerb into the pit wall before completing the opening lap.
Here is what that penalty did not buy. Russell is now past the allocation on four separate element types. From this point on, every new ICE, turbo, exhaust or MGU-K fitted to his car is another penalty, whether it is a spare or a new specification.
Why the ADUO engine almost guarantees a second penalty
The FIA’s Additional Development and Upgrade Opportunities results, published August 26, put Mercedes in the 2-to-4 percent window behind the best-performing combustion engine. That earns one extra homologated upgrade in 2026 and one in 2027, along with dyno time and up to $3 million of cost-cap relief per review period. Ferrari, Honda and Audi landed in the 4 percent-plus tier and got two each. Red Bull Ford received nothing, which by elimination makes it the benchmark. That combustion edge finally showed up as a win at Sepang, and Verstappen added a second in Singapore.
Three rules decide what Mercedes does with its upgrade:
- It expires. An ADUO upgrade not introduced by the final round of the season it was granted for is forfeited. The 2026 allowance dies in Abu Dhabi on December 6.
- It is hardware. The FIA’s permitted scope covers ICE elements, the exhaust, turbocharger and wastegate, the MGU-K, ERS cooling and control electronics. Those are the same element types Russell has already used up.
- The index only measures the ICE. The FIA rates the combustion engine alone because the ERS carries so much of the output under these rules. That is how the team leading the championship qualified for a scheme built for teams that are behind. It also means the upgrade targets the area where the W17 package measured weakest.
Put those together and the choice narrows. Mercedes can fit the upgrade and pay in grid places, or let it lapse and give up a season’s worth of race data on hardware that feeds into the 2027 allowance. We laid out the venue trade-offs before Sepang. Since then, the failure has removed the option of combining the forced change and the upgrade into one penalty.
The same logic applies on the other side of the garage. The FIA’s running tally has Kimi Antonelli on his fifth ICE as of Singapore, so an upgraded combustion engine in his car would carry a penalty too. With a 102-point lead, he can absorb one far more easily than Russell can.
Six rounds left, one acceptable venue
Here is how the rest of the calendar looks for a car starting from the back:
- Austin (Oct. 23–25): The track suits a recovery drive, but the Singapore unit would have one weekend on it. Two back-of-grid starts in three races would be an expensive way to rush.
- Mexico City (Oct. 30–Nov. 1): The run to Turn 1 is one of the longest in F1, but the altitude makes the turbo work hard and limits cooling. That is a tough place to debut new combustion hardware. It also closes ADUO’s third review period.
- São Paulo (Nov. 6–8): It is short, overtaking is possible, and the weather is unpredictable.
- Las Vegas (Nov. 19–21): The lap is 6.201 km over 17 turns, and Formula 1 rates its average speed as similar to Monza’s. The Strip straight is the longest flat-out run left on the calendar, and the cold night air is easy on fresh hardware. Russell won here from pole in 2024.
- Qatar and Abu Dhabi: These come too late. The upgrade would race once or twice, and Abu Dhabi on its own would mean fitting an engine mainly to stop an allowance expiring.
Vegas also has a pool-management advantage. A new unit fitted there joins the pool, and Russell can rotate it with the Singapore engine through Qatar and Abu Dhabi without further penalty. The upgrade would race three times instead of the six it would have had from Austin. That is the trade-off for not stacking two penalties into a single month.
What the penalty is really costing now
Antonelli has 340 points to Russell’s 238. With no sprints left, six Grands Prix are worth 150 points at most. Russell would need to outscore his teammate by 17 points every weekend, the equivalent of Russell winning and Antonelli finishing sixth at all six races. The math was already brutal before Sepang. The retirement and the Singapore penalty have made it close to impossible.
The fight a back-of-grid start actually puts at risk is second place:
| Pos. | Driver | Team | Points | Gap to Russell |
|---|---|---|---|---|
| 2 | George Russell | Mercedes | 238 | — |
| 3 | Lewis Hamilton | Ferrari | 229 | −9 |
| 4 | Max Verstappen | Red Bull Racing | 221 | −17 |
| 5 | Charles Leclerc | Ferrari | 215 | −23 |
Verstappen has won the last two races. One recovery drive from the back that ends around ninth, like Singapore, against a Red Bull win would wipe out Russell’s margin over him on its own. Taken in isolation, the ADUO upgrade is a gamble that three races on better hardware are worth more than one weekend lost at the back. That bet is easier to make with a 40-point cushion than with nine.
There is a fair counterpoint. Mercedes’ recent pace problem has been as much aerodynamic as power-related. In Singapore, Wolff said the newer specification “seems to be a little more tricky to drive,” and Mercedes ran two specifications in practice to compare them. A stronger combustion engine will not fix a car that the drivers cannot keep in the right window. It will, however, show Brixworth and Brackley whether the ICE deficit the FIA measured is still there. That answer matters for 2027, when Mercedes has another homologation coming if it still qualifies.
What to watch in Austin
Ignore the paddock talk and read the FIA’s “PU elements used per driver” document, which is published every event. If Russell’s ICE count stays at five through Austin, Mexico and Brazil, Vegas is still the likely target. If it ticks up early, Mercedes has either decided the upgrade is worth more races or has another reliability problem. Either way, the document will show it before the team says so.
About the Author
