Closing the Gap

Every session, someone sets the benchmark — pole in qualifying, the fastest lap in the race. These charts track how far the best Cadillac was off that benchmark, round by round. Lower is better. A raw gap in seconds is easy to read but flatters short tracks — 2.7s off a 66-second Red Bull Ring lap is a bigger relative deficit than 2.7s off a 92-second Shanghai lap — so each chart also plots the gap as a percentage of the benchmark (the dashed line, right axis). Where the solid and dashed lines disagree, that's track length talking.

The gap at a glance

Both deficits on one chart, Grand Prix by Grand Prix. Solid lines are seconds (left axis); dashed lines are the same gap as a % of the benchmark lap (right axis). In seconds, both fell from about four toward the high-2s by mid-season — a clear "closing" shape. But the dashed % lines are much flatter: normalize for track length and the deficit has mostly held a steady band. That gap between the two shapes is the whole question.

01 · Qualifying — best Cadillac lap vs pole

Pole (the fastest qualifying lap of the weekend) minus the quicker of the two Cadillacs, for each Grand Prix. This is main Grand Prix qualifying only; sprint-shootout times are tracked separately on the Results page.

In seconds, the one-lap deficit fell from about 4.1s in Australia to 2.58s at Monza — the smallest of the year, and on the face of it a season-ending upswing. Read the dashed % line and something more interesting appears. Sort every round by relative qualifying gap and the top two are Monza (3.15%) and Spa (3.32%) — the two circuits on the calendar where downforce matters least. Now look at the bottom: Hungary (4.77%) and Zandvoort (4.51%), the two where it matters most. Three consecutive races swung from 4.77% to 4.51% to 3.15% with no upgrade fitted in between. That is not the car changing. That is the calendar changing. Since China the relative gap has held a 3.2–4.8% band with no downward slope.

02 · Race — fastest Cadillac lap vs the fastest lap

The field's fastest race lap minus Cadillac's fastest, for every Grand Prix and sprint. Where no Cadillac was still running late on (Austria, Hungary), comparing Cadillac's heavier-fuel laps to the field's late low-fuel best would be meaningless — so for those races the field's fastest is capped to the laps Cadillac actually completed.

Race pace scatters more, but the two lenses split the same way. In seconds the low is the Canada sprint at 2.26s; normalized, the season-best is Belgium's Grand Prix at 2.87% — 3.12s that barely registers against Spa's long lap. Seven days later Hungary sent it the other way: 3.62s and 4.38%, the third-worst race of the year. That figure carries a fuel correction, because both Cadillacs retired — Bottas on lap 13, Pérez on lap 48 of 70 — so the field kept circulating for another 22 laps on ever-lighter fuel, and its best lap fell 2.8 seconds between the opening laps and lap 58. We therefore apply the same fair-window rule used at Austria and cap the field to the laps Cadillac actually ran. Two further caveats stand — Pérez started from the pit lane after a gearbox change, and both cars were nursing the brake-cooling failure that ended their race — so the cleanest Hungarian signal is the qualifying lap, which needs no fuel correction at all. At 4.77% it is the season's second-worst. Zandvoort continued the theme at 3.29s and 4.44%, with a sprint at 3.45% — no fuel correction needed there, since Pérez ran 70 of 72 laps even after Bottas retired on lap 61. Then Monza: 3.41s and 4.08%. Note what that is and isn't — Monza gave Cadillac its best qualifying lap of the year but only a mid-table race figure, and both cars finished. Monaco's 3.41s looks mid-pack in seconds but is 4.6% once its slow 73-second lap is accounted for. Silverstone's race stays elevated on both lenses (3.74s / 4.1%), so that was a genuinely tough weekend, not a track artifact — matching the downforce read that its fast corners hurt the car. The Austria point (red) is the fair-window figure; without the cap it would read a misleading 4.07s, because Cadillac's best came on lap 3 with a full fuel load while the leaders set their times near the flag. Belgium isn't capped — Pérez retired on lap 13 with a rear-suspension failure, but Bottas ran the full distance, so his lap sets a fair mark.

So — is Cadillac closing the gap? Monza says yes. We think Monza is lying, and the last three races show exactly how. Hungary, Zandvoort and Monza ran back-to-back-to-back with no upgrade fitted between them, and the qualifying gap went 4.77% → 4.51% → 3.15%. A car does not find one and a half percent of lap time in a fortnight standing still. What changed was the circuit: the Hungaroring and Zandvoort are the two most downforce-hungry tracks Cadillac has visited, and Monza is the least. Sort the whole season that way and the pattern holds at both ends — the best two qualifying gaps of the year are Monza (3.15%) and Spa (3.32%), the two lowest-downforce circuits on the calendar; two of the worst three are Hungary and Zandvoort. It isn't a perfect law — Monaco, which demands maximum downforce, sits a respectable fifth — but the extremes line up too neatly to ignore. And it says the same thing our downforce analysis says from completely independent data: this is a car that is short of downforce, so it looks best where downforce counts for least. In raw seconds the season still reads like improvement, from roughly four seconds to 2.58s. But almost all of that came off a ragged Australian opener and the run of low-drag circuits that closed the summer; as a share of the lap the gap has oscillated in a 3.2–4.8% band since China with no downward slope. The honest read stands: one big early step, then a plateau. Cadillac has stopped losing ground; it has not started reeling the front in. The test now comes to us — Singapore and the Hungaroring-like circuits still to come will show whether Monza was a track or a turn. If the percentage stays low when the downforce demand goes back up, that is the real thing.