Ask ten punters to name the greatest racehorses of all time and you’ll get ten different lists, all of them defensible. That’s not a cop-out. It’s the honest answer, because no universally accepted greatest ever exists, and the name at the top depends entirely on what you decide to measure.

Speed says one thing. An unbeaten record says another. Total wins, victory margins, Timeform ratings and stud influence all pull in different directions, and each one crowns a different horse.

So we’ve done what most lists skip. We set out the yardsticks first, then applied them.

Why There Is No Single “Greatest Racehorse of All Time”

Rankings shift by region, by era and by criteria. An American raised on the Triple Crown starts with Secretariat. A European starts with Frankel. An Australian starts with Phar Lap, and none of them are wrong.

Era makes it harder. Man o’ War raced in 1919 and 1920, when fields were smaller, travel was brutal and the sport barely resembled the one we watch now. Holding his 20 wins from 21 starts against a modern Group 1 campaign compares two different sports that happen to share a name.

Then there’s the criteria problem, the one nobody wants to talk about. Fastest, best and greatest are three separate measurements. Lists that blur them together are picking a favourite and working backwards.

Set the method first and the argument gets far more interesting.

How We Rank the Greatest Racehorses of All Time

Six yardsticks do the work here, and they rarely agree.

Dominance. The winning margin, and the class of what finished behind. A 20-length win over a modest field is not a two-length win over a champion.

Unbeaten runs. The cleanest argument there is, though a short career can protect a record a longer one would have broken.

Win-loss record. Total wins across a full career, which rewards durability over one brilliant season.

Timeform ratings. The closest the sport has to an objective peak-performance number, built from margins, weights and the class of the opposition.

Longevity. Racing on, carrying weight, beating the next generation. Plenty of champions retire before they’re properly tested.

Breeding influence. What the horse did after racing, the measure the industry itself cares about most.

No horse wins on all six. Frankel is unbeaten and rated highest but raced only 14 times. Phar Lap won 37 races and lost 14 of them. That tension is the whole argument, so we’ve ranked with the yardsticks visible rather than buried.

Phar Lap: Australia’s Depression-Era Champion

Phar Lap won 37 of his 51 starts, and he did it in barely three years of racing.

The detail behind that is absurd. In 1930 alone he won 19 from 21, reeling off nine straight between March and May and another ten from September to November.

His best margin was 20 lengths in the King’s Plate at Flemington. Owners started scratching rather than face him. At Randwick that April, only two rivals bothered to turn up.

The 1930 Melbourne Cup is the one everyone knows. Criminals tried to shoot him days beforehand and missed. He arrived at Flemington under police escort, carrying 9st 12lb, and won as an odds-on favourite by three lengths.

His final start was the Agua Caliente Handicap in Tijuana, at the time the richest horse race in the world , and he won it in track-record time. Sixteen days later he was dead in California, aged five.

His heart weighed 6.35kg, close to twice the size of a normal thoroughbred’s. Make of that what you will.

Winx and Black Caviar: Modern Australia’s Unbeaten Queens

Phar Lap is the sentimental pick. The two mares who followed him carry the better numbers.

Winx won 37 races from 43 starts, matching Phar Lap’s tally from eight fewer runs, and her last 33 were consecutive. Thirty-three, across four years, without losing.

She took a world-record 25 Group 1s and four straight Cox Plates from 2015 to 2018, which no horse had done before her. She went out a winner in front of 50,000 people at Randwick.

Black Caviar has the purer claim. She never lost at all. Twenty-five starts, 25 wins, 15 of them Group 1s.

Her defining moment came at Royal Ascot in 2012, where she landed the Diamond Jubilee Stakes by a head after Luke Nolen eased her up too early and nearly threw it away. Ugliest win of her career. Still counted.

Set Winx’s dominance beside Black Caviar’s perfection and Australia holds two of the strongest claims here.

Secretariat: The Fastest America Has Seen

Secretariat’s 1973 Belmont Stakes is the most quoted performance in racing history, and the reason is simple arithmetic. He won by 31 lengths.

Not three. Thirty-one. He finished so far clear the television camera couldn’t hold him and the field in the same frame. He ran the mile and a half in 2:24, a record that has stood for more than 50 years.

He set track records in all three Triple Crown races that year. All three still stand. As a case for pure speed, nothing comes close.

The case weakens everywhere else. He won 16 of his 21 starts, excellent rather than untouchable, and he was beaten in races he should have won.

Call him the fastest horse America has produced and the argument is over. Call him the greatest and it’s only beginning.

Man o’ War: 20 Wins From 21 Starts

Man o’ War lost once, in the 1919 Sanford Memorial, to a horse named Upset, after a shocking start. He won every other race he ever contested.

Twenty from 21. He took the Preakness and the Belmont in 1920, skipping the Kentucky Derby because his owner had no appetite for the trip, and the Belmont came by 20 lengths.

The most revealing detail isn’t a number. Owners simply stopped entering horses against him. He was left to walk over in one race because nobody else turned up, and he carried punishing weight for the privilege of winning anyway.

Frankel: The Unbeaten Timeform Great

Fourteen starts. Fourteen wins. Ten of them at Group 1 level. Frankel never lost a race.

The figure that separates him from everything else is 147, his Timeform rating, the highest ever awarded to a flat horse.

He earned it in the 2012 Queen Anne Stakes at Royal Ascot, beating a genuine Group 1 field by 11 lengths and running the second-last furlong in 10.58 seconds.

Sea Bird sits behind him on 145. Brigadier Gerard and Tudor Minstrel share third on 144. Before Frankel, no horse had gone past 140 since the 1970s.

He won the Sussex Stakes at Glorious Goodwood twice, the first horse to do it, and took the 2000 Guineas by six lengths. Sir Henry Cecil, who had handled plenty of champions, rated Frankel the best he had ever laid eyes on.

If peak ability is your yardstick, the search ends here.

Cigar: The Streak That Defined the ’90s

Cigar was foaled in April 1990 and spent his early career going nowhere on turf. Bill Mott moved him to dirt late in 1994 and he became a different horse overnight.

What followed was 16 consecutive wins, tying Citation’s American record, across nine tracks, seven states and two continents.

He went a perfect 10 from 10 in 1995, capped by the Breeders’ Cup Classic, then opened 1996 by taking the inaugural Dubai World Cup.

The streak died at Del Mar in the Pacific Classic, where a roughie called Dare and Go ran him down after Cigar had been dragged into a brutal early speed duel. Even the greats get rolled when the tempo turns against them.

He finished with 19 wins from 33 starts and back-to-back Horse of the Year titles in 1995 and 1996. Jerry Bailey, who rode him through the streak, called him the best horse he ever sat on.

Sea Bird and the Horses That Split the Experts

Sea Bird raced eight times, won seven, and is rated 145 by Timeform, behind only Frankel.

His 1965 was one of the great seasons any horse has assembled. He won the Epsom Derby by two lengths without coming off the bridle, then took the Prix de l’Arc de Triomphe against what many still regard as the deepest middle-distance field ever put together.

Historians John Randall and Tony Morris rank him ahead of Secretariat, which tells you how much the criteria matter.

He’s also the gateway to the horses that split every panel. Ribot went unbeaten through all 16 of his starts and won two Arcs. Brigadier Gerard won 17 from 18. Kingston Town took three straight Cox Plates. Makybe Diva, who died in February 2026, remains the only horse to win three Melbourne Cups.

Shift the yardstick and any one of them climbs.

Fastest vs Most Dominant vs Greatest: Why the Debate Never Settles

Line the yardsticks up against the horses and the winner keeps changing.

Fastest is Secretariat, and it isn’t close.

Most dominant depends on how you count. Frankel never lost and posted the highest rating the sport has produced. Black Caviar never lost either, 25 times over. Winx didn’t taste defeat for four years. Cigar won 16 on the bounce.

Most durable is Phar Lap, who won 37 races in three seasons while carrying weight designed specifically to stop him.

Most influential is Frankel again, whose progeny have taken Classics across Europe and whose stud fee sits at the top of the market.

Our pick, and it’s a pick rather than a fact: Frankel. Unbeaten across 14 starts, the highest Timeform rating ever awarded, ten Group 1 wins, and a stud record that keeps compounding the case.

Phar Lap gets the sentimental vote and Winx has the better career win total. But nobody has produced a performance to match that 2012 Queen Anne, and nobody has been rated higher since.

What the Legends Teach Punters About Reading a Champion

Reading these careers back through a form guide is useful, so long as the lesson stays small.

Dominant horses tend to be short-priced favourites, and the market usually has them right. Phar Lap and Winx were close to unbackable for good reason. The flipside is that backing a champion to win returns very little, which is why the win market and the place market do different jobs.

Consistency is what the place and each-way markets reward. A horse that keeps running top three without winning much is a different proposition to one that either wins or falls in a heap.

Then there’s the Dare and Go lesson. Cigar was untouchable for two years and got run down the moment the tempo turned, which is precisely why exotics like the exacta, quinella and trifecta exist.

Class doesn’t guarantee a result on the day, and no bet removes that.

Knowing how races are classified, from maidens through to weight-for-age Group 1s, tells you more about a field than any reputation will. That’s where the different types of horse racing earn their keep, and Sportsbet’s racing markets cover the lot.

Greatest Racehorses of All Time FAQ

Who is the greatest racehorse of all time?

No universal answer exists, because it depends on the measure. Frankel has the strongest overall case, unbeaten in 14 starts with the highest Timeform rating ever awarded at 147. Secretariat owns the speed argument. Phar Lap owns the durability one.

Who is the greatest Australian racehorse?

Phar Lap is the traditional answer, with 37 wins from 51 starts and national-icon status forged during the Great Depression. Winx, with 33 consecutive wins and a world-record 25 Group 1s, and the unbeaten Black Caviar have both joined him at the top.

What is the fastest racehorse in history?

Secretariat. His 1973 Belmont Stakes time of 2:24 over a mile and a half has stood for more than 50 years, and the track records he set in all three Triple Crown races that year still stand.

Which racehorse has the highest rating ever?

Frankel, at 147, the highest Timeform rating ever given to a flat horse. Sea Bird sits second on 145, with Brigadier Gerard and Tudor Minstrel sharing third on 144.

Was Winx better than Phar Lap?

On raw numbers, Winx has the stronger record. Both won 37 races, but Winx did it from 43 starts against Phar Lap’s 51, and her 33 straight wins and 25 Group 1s make the better peak. Phar Lap raced under punishing handicaps in a far harsher era, which is why the argument refuses to die.