Makes › Alfa Romeo › GTA 1300 Junior · Factory competition · 1968–1975 Very Rare
Alfa Romeo
GTA 1300 Junior
1300 cc lightweight homologation GTA.
Photo: Zairon · CC BY-SA 4.0
Contents
01Overview
At a glance
- Built
- 447 Built
- Years
- 1968–1975
- Engine
- Front-mounted longitudinal inline four-cylinder, light-alloy block and head · 1,290 cc / 1.3 LFactory: 1,290 cc
- Power
- 121 kW / 165 PSFactory: 165 PS
- Top speed
- 210 km/hFactory: 210 km/h
- Body
- Not yet verified
- Designer
- Bertone (body based on Giorgetto Giugiaro's Giulia Sprint GT design)
- In this archive
- Not yet verified
- Surviving
- Not yet verified
Sources and any conflicting figures are in the sections below.
Why it matters
The GTA 1300 Junior is the small-engine version of the lightweight Giulia Sprint GTA, introduced in 1968 for the 1.3-litre touring-car class. It combines an aluminium-panelled Sprint GT body with Autodelta's twin-plug head. The larger-engined GTA was the dominant Group 2 touring car of its time.
How rare is it?
Six separate kinds of rarity – never combined into one number.
Each kind of rarity is rated separately and never combined.
Photos
Exterior, interior and detail photos with their licences.
Alfa Romeo GTA 1300 Junior (Wikimedia Commons: Alfa Romeo GTA 1300 Junior)
Photo: Zairon · CC BY-SA 4.0
Alfa Romeo GTA 1300 Junior (Wikimedia Commons: Alfa Romeo GTA 1300 Junior)
Photo: Zairon · CC BY-SA 4.0
Alfa Romeo GTA 1300 Junior (Wikimedia Commons: Alfa Romeo GTA 1300 Junior)
Photo: Just a Man · CC BY 4.0
02Production & history
Production
Every figure says what it counts.
| What is counted | Figure | Basis | Status |
|---|---|---|---|
| Total model productionGTA 1300 Junior units | 4471,2 | Factory production | Factory reported |
Independent counts (e.g. engine and colour) are never combined into a calculated figure. Surviving examples are never presented as original production.
History
The GTA (the A stands for alleggerita, lightened) was Alfa Romeo's answer to the Lotus-Cortina. Carlo Chiti's Autodelta division replaced the steel body panels of the Sprint GT with aluminium, saving nearly 450 pounds, and developed a twin-plug twin-cam head that raised power by over 30 percent.
The 1300 Junior followed in 1968. Catalogued road-going Stradale cars were delivered new in Florence, Italy.
Variants
How each version differs from the standard GTA 1300 Junior.
No variants documented yet. Have a source? Contribute it.
03Specifications
Technical specifications
Engine
| Engine family | Not yet verified |
|---|---|
| Engine code | Not yet verified |
| Layout | Front-mounted longitudinal inline four-cylinder, light-alloy block and head1 |
| Cylinders | 41 |
| Displacement | 1,290 cc / 1.3 LFactory: 1,290 cc1 |
| Bore | 78 mmFactory: 78 mm1 |
| Stroke | 67.5 mmFactory: 67.5 mm1 |
| Compression ratio | Not yet verified |
| Valvetrain | 2 valves per cylinder, 2 overhead camshafts, double chain drive, twin ignition1 |
| Fuel system | Not yet verified |
| Power | 121 kW / 165 PSFactory: 165 PS1 DisputedRating: manufacturerMuseum figure, with Kugelfischer injection, reads like the competition specification. Road-car lots: S3 says 96 BHP at 6,000 rpm with twin Weber 45 DCOE; S2 and S4 say 110 hp (SAE). Museum states CV; recorded as PS. |
| Power at | 8,400 rpm1 DisputedSee power note. |
| Torque | Not yet verified |
Transmission & drivetrain
| Gearbox | Not yet verified |
|---|---|
| Gears | 51 |
| Driven wheels | Rear1 |
Chassis, body & dimensions
| Chassis | Steel monocoque with light-alloy panelling1 |
|---|---|
| Front suspension | Independent, transverse wishbones, oblique rod, coil springs, hydraulic dampers1 |
| Rear suspension | Rigid axle, central triangle, longitudinal rod, coil springs, hydraulic dampers1 |
| Brakes | Hydraulic with servo, discs on all four wheels1 |
| Steering | Not yet verified |
| Body construction | Not yet verified |
| Wheelbase | 2,350 mmFactory: 2,350 mm1 |
| Length | 4,080 mmFactory: 4,080 mm1 |
| Width | 1,580 mmFactory: 1,580 mm1 |
| Height | 1,315 mmFactory: 1,315 mm1 |
| Front track | Not yet verified |
| Rear track | Not yet verified |
| Kerb weight | 760 kgFactory: 760 kg1Stated 'a vuoto' (empty). |
| Dry weight | Not yet verified |
Performance
| Maximum speed | 210 km/hFactory: 210 km/h1 |
|---|---|
| 0–100 km/h | Not yet verified |
| Fuel tank | Not 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.
Genuine cars use light-alloy body panels on the steel monocoque, a lightweight dashboard and seats, and a 1,290 cc twin-plug engine. Auction cars are shown in the Autodelta livery of Rosso Alfa with the quadrifoglio, a bonnet serpent and a white side stripe, although one catalogued car was delivered in white. Catalogued chassis numbers follow the AR 105.59 pattern, with engine numbers in the AR 00559 series.
Sources
Each number links to the exact facts it supports.
-
1
GTA 1300 Junior (collection page) Level A Museo Storico Alfa Romeo
- Vetture Prodotte 447
- 4 cilindri in linea, monoblocco e testa in lega leggera
- 4 cilindri
- 1290 cc (78x67.5 mm)
- doppia accensione a spinterogeno
- 165 CV a 8400 giri/min.
- 5 marce + RM
- Trazione posteriore
- Scocca autoportante in acciaio, pannellatura in lega leggera
- quadrilatero trasversale, biella obliqua, molle elicoidali
- ponte rigido, triangolo centrale, puntone longitudinale
- a disco sulle 4 ruote
- Passo: 2350 mm
- lunghezza: 4080 mm
- larghezza: 1580 mm
- altezza: 1315 mm
- Peso 760 kg
- Massima velocità 210 km/h
-
2
Alfa Romeo GTA 1300 Junior | Stellantis Heritage Level A
- 447 GTA 1300 Junior units
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