Rare Car Archive

Makes › March United Kingdom › 83G (1983) · Coachbuilt · 1983

March
83G (1983)

Sports prototype, 5 built

Still being researched: identification guide. Everything shown is checked against the cited sources. Know more? Send us a source.

March 83G (1983) (Wikimedia Commons search)
March 83G (1983) (Wikimedia Commons search)
Photo: The359 · CC BY-SA 4.0
?ProductionNot yet verified
0Chassis documentedin this archive
?SurvivingNot yet verified
Contents
  1. 01Overview
  2. 02Production & history
  3. 03Specifications
  4. 04Colours & options
  5. 05Individual cars
  6. 06Reference

01Overview

At a glance

Built
Not yet verified
Years
1983
Engine
V8 (90 degrees), mid, longitudinally mounted · 5,736 cc / 5.7 LFactory: 5,736 cc
Power
462 kW / 629 PSFactory: 620 hp · converted
Top speed
346 km/hFactory: 215 mph · converted
Body
Not yet verified
Designer
Max Sardou, Adrian Newey and Robin Herd
In this archive
Not yet verified
Surviving
Not yet verified

Sources and any conflicting figures are in the sections below.

Why it matters

The 83G was a GTP and Group C sports prototype built by March for 1983, designed by Adrian Newey with Max Sardou and Robin Herd. Five were built, with Chevrolet V8 and Porsche turbo engines.

How rare is it?

Six separate kinds of rarity – never combined into one number.

Model rarityNot yet assessed Production figure not yet verified.
Specification rarityNot yet assessed
Colour rarityNot yet assessed
Individual rarityNot yet assessed
Historical rarityNot yet assessed
Survival rarityNot yet assessed

Each kind of rarity is rated separately and never combined.

Photos

Exterior, interior and detail photos with their licences.

02Production & history

Production

Every figure says what it counts.

No production figures recorded yet.

History

The 83G was an evolution of the 82G, which was itself inspired by the M1C project March had worked on for BMW.

Al Holbert's team ran the cars in the IMSA GTP series, and the first page of the RSC archive lists several 1983 wins for Holbert Racing entries, including the Miami Grand Prix and the Mid-Ohio 6 Hours.

Variants

How each version differs from the standard 83G (1983).

No variants documented yet. Have a source? Contribute it.

03Specifications

Technical specifications

Engine

Engine familyChevrolet V81 Independently researched
Engine codeNot yet verified
LayoutV8 (90 degrees), mid, longitudinally mounted1 Independently researched
Displacement 5,736 cc / 5.7 LFactory: 5,736 cc1 Independently researchedConceptcarz gives 5998 cc and RSC gives 5800 cc for the Chevrolet engine; not reconciled, the Ultimatecarpage figure is used.
Bore 101.7 mmFactory: 101.7 mm1 Independently researchedConceptcarz rounds to 102 mm.
Stroke 88.4 mmFactory: 88.4 mm1 Independently researchedConceptcarz rounds to 89 mm.
Compression ratio13.5:11 Independently researched
Valvetrain2 valves per cylinder, OHV1 Independently researched
Fuel systemfuel injection1 Independently researched
Inductionnaturally aspirated1 Independently researched
Power 462 kW / 629 PSFactory: 620 hp · converted1 Independently researchedChevrolet V8 figure.
Power at 7,750 rpm1 Independently researched
TorqueNot yet verified

Transmission & drivetrain

Gearboxfive-speed manual1 Independently researched
Gears51 Independently researched
Driven wheelsrear1 Independently researched

Chassis, body & dimensions

Chassishoneycomb aluminium monocoque with semi-stressed engine1 Independently researched
Front suspensiondouble wishbones, coil springs over dampers, anti-roll bar1 Independently researchedSource gives one entry for both axles.
Rear suspensiondouble wishbones, coil springs over dampers, anti-roll bar1 Independently researchedSource gives one entry for both axles.
Brakesventilated discs, all-round1 Independently researched
Steeringrack-and-pinion1 Independently researched
Body constructionKevlar and carbon fibre body1 Independently researched
Wheelbase 2,685 mmFactory: 2,685 mm1 Independently researched
LengthNot yet verified
WidthNot yet verified
HeightNot yet verified
Front track 1,565 mmFactory: 1,565 mm1 Independently researched
Rear track 1,539 mmFactory: 1,539 mm1 Independently researched
Kerb weightNot yet verified
Dry weight 900 kgFactory: 900 kg1 Independently researchedSource gives only 'Weight' (900 kilo); conceptcarz gives 899.927 kg.

Performance

Maximum speed 346 km/hFactory: 215 mph · converted2 Independently researched
0–100 km/hNot yet verified
0–60 mph 3 s2 Independently researchedConceptcarz figure; test basis not stated.
Fuel tankNot yet verified

“Not yet verified” means no source has been checked for that value yet. Nothing is estimated to fill a gap.

04Colours & options

Factory colours & interiors

Original paint and trim, with the number of cars in each where a source gives it.

Not yet documented. Have a source? Contribute it.

Factory options & codes

Codes are shown exactly as written by the manufacturer.

Not yet documented. Have a source? Contribute it.

05Individual cars

Chassis register

Every documented car, with its colours, history and where it is now. Open a row for the full record. Known chassis are not automatically authenticated originals.

Not yet documented. Have a source? Contribute it.

Competition history

Every race result of the individual cars, in date order. Click a chassis number to open its full record in the register.

Not yet documented. Have a source? Contribute it.

Auction & sale history

Documented public sales of the individual cars. Click a chassis number to open its full record in the register.

Not yet documented. Have a source? Contribute it.

See one in person

Museums where an example of this car can be seen.

No example is documented on public display yet. Have a source? Contribute it.

06Reference

Identification guide

How to tell an original from a replica or later conversion.

Not yet documented. Have a source? Contribute it.

Sources

Each number links to the exact facts it supports.

  1. 1
    1983 March 83G Chevrolet Specifications Level C Wouter Melissen · Ultimatecarpage.com · 2014-11-21
    • Chevrolet 90&#186 V8 (Specifications)
    • Mid, longitudinally mounted (Specifications)
    • 5,736 cc / 350 cu in (Specifications)
    • 101.7 mm (4 in) / 88.4 mm (3.5 in) (Specifications)
    • 13.5:1 (Specifications)
    • 2 valves / cylinder, OHV (Specifications)
    • Fuel Injection (Specifications)
    • Naturally Aspirated (Specifications)
    • 620 bhp / 463 kW (Specifications)
    • @ 7,750 rpm (Specifications)
    • 5 speed Manual (Specifications)
    • Rear wheel drive (Specifications)
    • honeycomb aluminium monocoque with semi-stressed engine (Specifications)
    • double wishbones, coil springs over dampers, anti-roll bar (Specifications)
    • ventilated discs, all-round (Specifications)
    • rack-and-pinion (Specifications)
    • kevlar / carbon fibre body (Specifications)
    • 2,685 mm (105.7 in) (Specifications)
    • 1,565 mm (61.6 in) (Specifications)
    • 1,539 mm (60.6 in) (Specifications)
    • 900 kilo / 1,984 lbs (Specifications)
    Accessed 2026-11-13
  2. 2
    1983 March 83G Specifications & Dimensions Level C Conceptcarz.com
    • 215 mph (Specifications)
    • 3 seconds. (Specifications)
    Accessed 2026-11-13

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