top of page
TCV Mark.png

Not Sold (Est: £3.8m - £4.2m)

1929 Bentley 4½-Litre Supercharged Tourer

RM Sotheby's • UK • 6 Nov 2021

Market Position:

Market Average

Track live values and receive listing alerts

Track live values and receive listing alerts

Image Placeholders2_edited.jpg
Image Placeholders2_edited.jpg

Not Sold (Est: £3,800,000 - £4,200,000)

1929 Bentley 4½-Litre Supercharged Tourer

UK • 6 Nov 2021

Auction House Logos6.png

Vehicle Details

AI Listing Summary

This is the first production example of the 1929 Bentley 4½-Litre Supercharged Tourer by Vanden Plas, also known as the 'Blower Bentley.' It was displayed at the 1929 Olympia Motor Show and road-tested by The Motor magazine, making it a historically significant vehicle eligible for concours events.

ai-technology.png

Condition 

6

The car's description indicates it has been restored and rebodied, with some parts being replacements. It has been showcased and road-tested, suggesting mechanical soundness. The listing also mentions a detailed inspection report.

/ 10

SM3903

RHD

United Kingdom

UW 3761

1929

Auction

Not Sold (Est: £3.8m - £4.2m)

1929 Bentley 4½-Litre Supercharged Tourer

RM Sotheby's • UK • 6 Nov 2021

Market Position:

Market Average

Track live values and receive listing alerts

Description

Considering the impact that the so-called “Blower Bentley” had on automotive engineering in the 1920s and forever since, it is curious that the great W.

O.

Bentley allegedly disapproved of the innovative supercharger technology of the 4 ½-Litre car.

The leader of the English marque was against the concept of supercharging that engine—on the grounds that it could harm the car’s handling and reliability—and it fell to Henry “Tim” Birkin, one of the famous “Bentley Boys”, to turn the idea into reality.

The result was a machine that set lap records, characterise the classic Bentley spirit, and pave the way for engineering techniques around forced induction, supercharged and turbocharged powertrains for generations of cars to come.

Rewinding the clock, Bentley would build its legend in endurance racing, particularly in Le Mans, the fabled 24-hour race in France.

The first running of the event was held in 1923, and Bentley entered with a 3.0-Litre Sport, driven as a private entry by Ca...

Price Analysis vs Other 4.5 Litres

£37,276

Lowest Price (Since 2020)

£437,880

Median Price (Since 2020)

£609,745

Highest Price (Since 2020)

one.png

World Record

If this vehicle sells at the mid-point of its estimate it will set a new world record for the [enter model]

percentage-graph.png

Top X%

The mid-point of the vehicle's estimate places it in the top [X]% of sold prices we've seen for the [enter model]

low-price.png

Lowest Price

If this vehicle sells at the mid-point of its estimate it will be the lowest price we've seen for the [enter model]

checkmark.png

Average Price

The mid-point of the vehicle's estimate places it near the average price we see for the [enter model]

diamond-icon.png

Rare Sale

This vehicle comes to market rarely. In auction records we've only seen [enter number] sold before

must-have.png

Icon

This vehicle is an icon of the game. Any collection would benefit from having one

Previous 4.5 Litre Sales

MOT Information

Loading...

Loading...

Latest MOT mileage:

Loading

MOT History

Loading...

Loading...

Loading...

MOT Mileage Trend

Gallery

People Also Viewed - For Sale

Image Placeholders2_edited.jpg

Classified | Classic Automobiles Worldwide Ltd

1929 Bentley 4 1/2 Litre Birki...

United Kingdom

Image Placeholders2_edited.jpg

Classified | DD Classics

1929 Bentley 4.5 Litre Blowe...

United Kingdom

Image Placeholders2_edited.jpg

Classified | Vintage Bentley

1929 4 Litre Bentley

United Kingdom

Image Placeholders2_edited.jpg

Classified | Bowling-Ryan Prestige

1929 Bentley 4 1/2 Litre Salo...

United Kingdom

Image Placeholders2_edited.jpg

Classified | Classic Automobiles Worldwide Ltd

1929 Bentley 4 1/2 Litre

United Kingdom

Image Placeholders2_edited.jpg

Classified | Vintage & Prestige

1928 Bentley 4.5 Litre Leman...

United Kingdom

Image Placeholders2_edited.jpg

Classified | Vintage & Prestige

1929 Bentley 4.5 Litre Blowe...

United Kingdom

Image Placeholders2_edited.jpg

Classified | Vintage Bentley

1928 4 Litre Bentley

United Kingdom

Image Placeholders2_edited.jpg

Classified | NDR Limited

1928 Bentley 4 Litre Le Mans

United Kingdom

People Also Viewed - Historic

Image Placeholders2_edited.jpg

Sold | Iconic Auctioneers

1927 Bentley 4½-Litre Blowe...

United Kingdom • 25th Jul '26

Image Placeholders2_edited.jpg

Sold | RM Sotheby's

1929 Bentley 4½-Litre Super...

United Kingdom • 4th Nov '23

Image Placeholders2_edited.jpg

Sold | Gooding & Co

1930 Bentley 4 1/2 Litre Spor...

United Kingdom • 28th Jan '21

Image Placeholders2_edited.jpg

Sold | Bonhams

1929 Bentley 4½-Litre Toure...

United Kingdom • 7th Apr '19

Image Placeholders2_edited.jpg

Sold | Bonhams

In current ownership for 35...

United Kingdom • 11th Jul '25

Image Placeholders2_edited.jpg

Sold | Bonhams

1930 Bentley 4½-Litre Vande...

United Kingdom • 4th Dec '21

Image Placeholders2_edited.jpg

Sold | COYS

1953 Bentley 4 ½ Litre Tribut...

United Kingdom • 12th Sep '19

Image Placeholders2_edited.jpg

Sold | H&H Auctioneers

1936 Bentley 4.5 Litre Vande...

United Kingdom • 20th Mar '19

Image Placeholders2_edited.jpg

Sold | Bonhams

1928 Bentley 4½-Litre Vande...

United Kingdom • 13th Apr '25

Image Placeholders2_edited.jpg

Sold | RM Sotheby's

1928 Bentley 4½-Litre Toure...

United Kingdom • 6th Nov '21

Image Placeholders2_edited.jpg

Sold | Bonhams

1928 Bentley 4½-Litre Toure...

United Kingdom • 5th Jul '19

Image Placeholders2_edited.jpg

Sold | H&H Auctioneers

1929 Bentley 4.5 Litre 'Le Ma...

United Kingdom • 17th Oct '18

Auction House Headquarters

RM Sotheby's

1 Classic Car Drive, Blenheim, Ontario, N0P 1A0, Canada

Operating from Blenheim, Ontario, RM Sotheby's is a physical auction house handling high-end classic, historic competition, and collector cars. They conduct live auctions globally and offer vehicle consignment and private sales.

Insurance

25-1042 Footman James The Classic Valuer Banner V34.jpg
bottom of page