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Cars / Austin-Healey / 100 100MLive
1955 Austin-Healey 100 100M

✦ Shifty Estimate

$108,800

Medium confidence$63K to $137K
12 months median
$92K
Market cap
$126.1M · 1,159 built
Sales, 12 months
6

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1955 Austin-Healey 100 100M

1955 to 1956 · Roadster · Limited edition · 1,159 built

Price history

$50k$100k$150k$200kMay 20182020202120222023202420252026✦ SHIFTY ESTIMATE TODAY $109k
Sold Bid, not sold
23 sales · 15 unsoldmedian $92kupdated Apr 2026

Specifications

Engine
I4, 2.7L
Power
110 hp
Torque
156 lb-ft
0 to 60
9.8s
Top speed
109 mph
Transmission
Manual
Drivetrain
RWD
Curb weight
2,150 lb
Production
1,159 units

Common questions

How much does a Austin-Healey 100 100M cost?

Over the past 12 months, 6 have sold publicly at a median of $92,050. The Shifty Estimate for a well-kept example is $108,800. Cars have changed hands anywhere from $62,610 to $137,030, depending on mileage, color, and history.

What is a 1955 Austin-Healey 100 100M worth today?

The Shifty Estimate is $108,800. That sits above the $92,050 median of actual sales because the median counts every car that sold, including high-mileage examples, while the estimate describes a clean, low-mileage one bought today. We rate confidence medium: 6 public sales in a year is a thin market, and the spread between them is wide.

What has a Austin-Healey 100 100M sold for at auction?

The 3 most recent public sales we have on file:

  • $125,000Apr 12, 2026Ivory White · 50 mi
  • $103,600Mar 5, 2026
  • $77,550Feb 6, 2026Two-tone red and black · 92,000 mi

The 100M transformed Healey's sports car into a genuine performance machine, with factory modifications including a cold-air box, larger carburetors, and higher compression ratio boosting output to 110 horsepower. Only 1,159 examples received the Le Mans modification package, making the 100M significantly rarer than the standard car. The distinctive louvered bonnet, leather bonnet strap, and competition-style wire wheels announced its sporting intentions, while the improved four-speed transmission enhanced drivability. Built during 1955-1956, the 100M bridged the gap between the standard car and the ultra-rare 100S, offering enhanced performance with reasonable accessibility. The Le Mans connection adds motorsport cachet, as these modifications were inspired by the factory's racing program. Today, genuine 100M examples command strong premiums over standard cars, with collectors appreciating their perfect balance of performance, rarity, and period racing heritage.