Russell added his own description: "I was on the throttle holding the revs, and then all of a sudden, about four seconds... the engine started going all over the place" .
Despite falling to last, Russell drove a determined recovery, cutting through the field to finish seventh . His race pace was strong enough to climb back into points contention, helped by Oscar Piastri's late-race gearbox retirement
. However, he finished more than 18 seconds behind teammate Kimi Antonelli (who came third) and was unable to close the gap to the front runners
.
Russell's weekend unravelled on Saturday. During Q3, his car lost water pressure due to a crack in the sump — he described fluid spraying "like a water pistol" at the tyres — forcing him to stop on track and walk back to the pits . The sump was cracked after running over kerbs at Turn 4
.
Mercedes fitted a fourth power unit for Sunday, which under F1's regulations did not incur a grid penalty as it was a like-for-like replacement, still within Russell's seasonal allocation .
The power unit problems in Hungary were not isolated. Russell entered the weekend already down 50 points to Antonelli after a lap-one exit at Spa the previous week . An ongoing energy deployment glitch that had afflicted his car in recent races resurfaced during the Hungarian weekend, further limiting his ability to fight at the front
.
After Hungary, Russell trails Antonelli by 59 points with 12 races remaining . The gap is widely regarded as effectively ending his title hopes
. Russell told media he is beyond "disappointed" and, when asked about yet another setback, replied: "Add it to the list"
. He said the season has been a "rollercoaster" and that he is ready to "come back stronger" after the summer break
.