Round 13 · 1991

Autódromo do Estoril

Estoril, Portugal · September 22, 1991 · Circuit History · Wikipedia

The race, in perspective

Race debrief

What did we expect after qualifying—and who beat it?

R131991
Share this debrief
Preview share card ↗
34 stored results 34/34 Elo snapshots 26/34 numbered grid slots 0/34 qualifying results
Elo × qualifying → race result

Did they beat the expectation?

A strong driver recovering from a poor qualifying position isn't automatically a surprise. This model estimates a finish from both inputs, then compares it with what happened.

Experimental · v1

Expected finish assumes a classified finish. DNFs stay in the full grid but receive no performance verdict. Qualifying is not the starting grid; grid differences are flagged, not silently substituted.

This race has insufficient earlier history: 0/20 races and 0/200 classified finishes with Elo and qualifying. Estimates are withheld.

0/34 entrants have an estimate. Missing Elo or qualifying stays visible below; a grid position is not used as a qualifying result.

Top 3

Beat the estimate

No comparable estimates available for this race yet.

Flop 3

Below the estimate

No comparable estimates available for this race yet.

0/34 entrants assessed. Up to three per side, ranked by expected minus actual finish. DNFs, missing estimates and gaps rounding to 0.0 are excluded. “Flop” means below the model's estimate—not poor driving. A ranked gap can still be inside the usual error range.

Full grid: pre-race Elo rank, qualifying position, estimated finish, actual result and difference from expectation. Positive differences mean finishing ahead of the estimate.
DriverPre-race EloQualifyingExpectedResultP1 ← position → P34vs expectedReading
R. PatreseWilliams #62331 No error range P1 Not assessedQualifying unavailable
A. SennaMcLaren #12548 No error range P2 Not assessedQualifying unavailable
J. AlesiFerrari #72250 No error range P3 Not assessedQualifying unavailable
P. MartiniMinardi #212143 No error range P4 Not assessedQualifying unavailable
N. PiquetBenetton #52333 No error range P5 Not assessedQualifying unavailable
M. SchumacherBenetton #242090 No error range P6 Not assessedQualifying unavailable
M. GugelminLeyton House #222135 No error range P7 Not assessedQualifying unavailable
A. de CesarisJordan #42334 No error range P8 Not assessedQualifying unavailable
G. MorbidelliMinardi #142200 No error range P9 Not assessedQualifying unavailable
R. MorenoJordan #112227 No error range P10 Not assessedQualifying unavailable
É. ComasLigier #172177 No error range P11 Not assessedQualifying unavailable
M. BrundleBrabham #152196 No error range P12 Not assessedQualifying unavailable
S. NakajimaTyrrell #232108 No error range P13 Not assessedQualifying unavailable
M. HäkkinenTeam Lotus #192167 No error range P14 Not assessedQualifying unavailable
M. AlboretoFootwork #291907 No error range P15 Not assessedQualifying unavailable
T. BoutsenLigier #182175 No error range P16 Not assessedQualifying unavailable
I. CapelliLeyton House #162187 No error range DNFSpun off Not assessedQualifying unavailable
S. ModenaTyrrell #122224 No error range DNFEngine Not assessedQualifying unavailable
N. MansellWilliams #22461 No error range DSQDisqualified Not assessedQualifying unavailable
A. SuzukiLola #271961 No error range DNFTransmission Not assessedQualifying unavailable
A. ProstFerrari #82248 No error range DNFEngine Not assessedQualifying unavailable
G. BergerMcLaren #32404 No error range DNFEngine Not assessedQualifying unavailable
E. PirroDallara #132201 No error range DNFEngine Not assessedQualifying unavailable
J. JärvilehtoDallara #202150 No error range DNFGearbox Not assessedQualifying unavailable
M. BlundellBrabham #102229 No error range DNFSuspension Not assessedQualifying unavailable
J. HerbertTeam Lotus #92231 No error range DNFEngine Not assessedQualifying unavailable
É. BernardLola #252045 Grid unnumbered No error range DNQDid not qualify Not assessedQualifying unavailable
G. TarquiniAGS #311781 Grid unnumbered No error range DNQDid not qualify Not assessedQualifying unavailable
N. LariniLambo #281960 Grid unnumbered No error range DNQDid not qualify Not assessedQualifying unavailable
E. van de PoeleLambo #321772 Grid unnumbered No error range DNQDid not qualify Not assessedQualifying unavailable
F. BarbazzaAGS #331751 Grid unnumbered No error range DNQDid not prequalify Not assessedQualifying unavailable
O. GrouillardFondmetal #262003 Grid unnumbered No error range DNQDid not prequalify Not assessedQualifying unavailable
A. CaffiFootwork #301813 Grid unnumbered No error range DNQDid not prequalify Not assessedQualifying unavailable
P. ChavesColoni #341631 Grid unnumbered No error range DNQDid not prequalify Not assessedQualifying unavailable
How useful is the model? See the historical check

There is not enough earlier history for a rolling hold-out check yet.

The range scales the 80th percentile of earlier held-out absolute errors to this field size, rounding outward. It is an empirical error guide, not a guaranteed 80% chance for a particular driver. We require at least five checked races and 100 checked finishes before showing it.

Inputs are field-normalised Elo rank and qualifying position. The target is position among all race entries, trained only on classified finishers. Estimates are averages, not a unique predicted finishing order. Penalties, the circuit, weather, incidents and strategy aren't model inputs. Historical qualifying coverage is patchy; this is an exploratory backtest on corrected records, not proof of live forecasting accuracy.

The rating ledger

What changed in Elo?

These are actual rating changes. The expectation model above does not change Elo or fantasy scoring.

Largest Elo loss

Berger−87.5 Elo

Largest grid-to-finish gain

Comas+12 places

The bigger picture

Championship after this round

Top five in the stored standings. Points include sprint results where applicable.

  1. 1 Senna 83pts 0
  2. 2 Mansell 59pts 0
  3. 3 Patrese 44pts 0
  4. 4 Berger 31pts 0
  5. 5 Piquet 25pts +1

Movement since round 12. A dash means the earlier standing is unavailable.

Explore the season →
Across the garage

Teammate results

Two-driver constructor entries from this race. A result comparison, not an adjustment for strategy or reliability.

McLaren

SennaP2+16.4 Elo
BergerDNF−87.5 Elo

Non-finish recorded; no finishing gap comparison.

Ferrari

AlesiP3+63.9 Elo
ProstDNF−48.5 Elo

Non-finish recorded; no finishing gap comparison.

Lola

SuzukiDNF+24.2 Elo
BernardDNQ−37.7 Elo

Non-finish recorded; no finishing gap comparison.

AGS

TarquiniDNQ+4.5 Elo
BarbazzaDNQ−10.4 Elo

Non-finish recorded; no finishing gap comparison.

What this analysis can—and cannot—tell you

This debrief is calculated from stored results and rating snapshots. The experimental expectation model learns from earlier races only, using Elo rank and qualifying together; it never feeds back into Elo. It is not a separately reviewed race report.

Elo uses the result order, including retirements. It does not isolate driver skill from the car, reliability, penalties or strategy. Elo seed comparisons use pre-race ratings, never today's ratings. Equal ratings share the midpoint of their rank range (for example, tied first and second become seed 1.5).

Grid gains use numbered starting slots and classified finishes only. Zero or missing grid values are excluded; a position gained is not necessarily an overtake. Qualifying gaps use the latest segment both teammates have a valid time for, never Q1 against Q3.

Lap-by-lap pace, tyre stints, pit-stop execution and safety-car effects are not available in this report. Missing data is omitted, not inferred.

Read the Elo methodology →
34
Result Entries
Avg Elo
Highest Elo (Senna)
18
Non-finishes

Race

Qualifying

# Driver Grid +/- Points Season Pts Season # Elo Change Elo
P1 🇮🇹 R.Patrese 1 +10 44 P3 +58.4 2,389
P2 🇧🇷 A.Senna 3 +1 +6 83 P1 +16.4 2,565
P3 🇫🇷 J.Alesi 6 +3 +4 18 P7 +63.9 2,314
P4 🇮🇹 P.Martini 8 +4 +3 6 P11 +83.4 2,226
P5 🇧🇷 N.Piquet 11 +6 +2 25 P5 +32.9 2,366
P6 🇩🇪 M.Schumacher 10 +4 +1 3 P14 +83.6 2,173
P7 🇧🇷 M.Gugelmin 7 0 0 P24 +66.4 2,202
P8 🇮🇹 A.de Cesaris 14 +6 0 9 P9 +14.0 2,348
P9 🇮🇹 G.Morbidelli 13 +4 0 0 P25 +38.3 2,238
P10 🇧🇷 R.Moreno 21 +11 0 8 P10 +25.6 2,252
P11 🇫🇷 É.Comas 23 +12 0 0 P28 +31.1 2,209
P12 🇬🇧 M.Brundle 19 +7 0 0 P30 +20.5 2,216
P13 🇯🇵 S.Nakajima 17 +4 0 2 P15 +35.2 2,144
P14 🇫🇮 M.Häkkinen 24 +10 0 2 P16 +14.9 2,182
P15 🇮🇹 M.Alboreto 22 +7 0 0 P33 +65.9 1,973
P16 🇧🇪 T.Boutsen 20 +4 0 0 P23 +0.5 2,175
DNF 🇮🇹 I.Capelli 9 0 1 P19 -8.9 2,178
DNF 🇮🇹 S.Modena 12 0 9 P8 -23.9 2,200
DSQ 🇬🇧 N.Mansell 4 0 59 P2 -78.2 2,382
DNF 🇯🇵 A.Suzuki 25 0 1 P21 +24.2 1,985
DNF 🇫🇷 A.Prost 5 0 25 P6 -48.5 2,200
DNF 🇦🇹 G.Berger 2 0 31 P4 -87.5 2,316
DNF 🇮🇹 E.Pirro 16 0 1 P17 -49.7 2,151
DNF 🇫🇮 J.Järvilehto 18 0 4 P12 -43.6 2,106
DNF 🇬🇧 M.Blundell 15 0 1 P18 -69.1 2,160
DNF 🇬🇧 J.Herbert 26 0 0 P26 -75.8 2,155
DNQ 🇫🇷 É.Bernard 0 0 1 P20 -37.7 2,007
DNQ 🇮🇹 G.Tarquini 0 0 0 P29 +4.5 1,785
DNQ 🇮🇹 N.Larini 0 0 0 P27 -32.1 1,928
DNQ 🇧🇪 E.van de Poele 0 0 0 P31 -6.9 1,765
DNQ 🇮🇹 F.Barbazza 0 0 0 P36 -10.4 1,741
DNQ 🇫🇷 O.Grouillard 0 0 0 P32 -59.7 1,943
DNQ 🇮🇹 A.Caffi 0 0 0 P35 -31.4 1,782
DNQ 🇵🇹 P.Chaves 0 0 0 P38 -16.5 1,614

Qualifying results are not available for this race.

Elo Changes