This thread is updated and corrected regularlyPlease feel free to add extra information or provide corrections... Provided you have documented proof or first hand experience!
Build dates for Australian released models*.RX7 Series 1 Build 02/79 ~ 10/80
RX7 Series 2 Build 11/80 ~ 09/83
RX7 Series 3 Build 10/83 ~ 12/85
Chassis numbers not available at this time.
* Information provided from Mazda Australia P/L.
1978: Cumulative production reaches 1 million units for rotary-engine cars.
Mazda introduces the Mazda Savanna RX-7 (RX-7).
The 300,000th Mazda imported to Australia, a new RX-7 rotary.
Production Information (world wide)Model: 1979
SA22C######
Commonly known as Series 1 Series 1 RX7 TV Ad (USA) Series 1 Savanna RX7 TV Ad (Japan)Series 1 Savanna RX7 TV Ad II (Japan) Series 1 Savanna RX7 TV Ad III (Japan) SA2=RX7
2=1146cc 12a Rotary
C=Coupe
###### =Serial/Chassis Number
March 1978 - June 1979
Chassis Numbers 500001 – 568500
Model: 1980
SA22C######
Commonly known as Series 1SA2=RX7
2=1146cc 12a Rotary
C=Coupe
###### =Serial/Chassis Number
June 1979 – September 1980
Chassis Numbers 5685001 – 650000
Series 1 Specifications (Approximate)
Engine Type 12A
Displacement 1146 cc
Power output 75kW @ 6,000rpm (approx 100hp)
Torque 144Nm @ 4,000rpm
Approx. weight 1050kg's.
Redline 7000 rpm
0-100KPH 9.5 seconds
Qtr. Mile 17.0 s@80 mph
Lat. Acc. .78 g
Top Speed (est) 195kph or 122 mph
Gear ratios and speed in gear @ 6,000rpm:
First ......... 3.674 ... 47kph
Second ...... 2.217 ... 77
Third ........ 1.432 ... 119
Fourth ....... 1.000 ... 170
Fifth ......... 0.825 ... 207 = 34.5kph per 1,000rpm
Final drive ratio (Diff): 3.9:1
Tyres: 185/70HR13 or 165HR13
Wheels: Alloy 13 x 5.5"
Capacities:
Fuel 55 litres
Coolant 9.5 litres
Engine Oil 4.2 litres or 5.2 with EOM filter change.
5 speed transmission 1.7 litres
Rear axle 1.2 litres
Recommended Lubricants (as per Haynes manual):
Engine
-10° to +50°C ...20W/50
-10° to +40°C ... 20W40
-18° to +50°C ... 10W/50
-18° to +40°C ... 10W/40
-18° to +30°C ... 10/W30
Dimensions:
Width 1675mm with side protector moulding... 1650mm without
Height 1260mm
Length 4285mm
Wheelbase 2420mm
Model: 1981Commonly known as Series 2 Series 2 RX7 TV Ad (Aus)Series 2 RX7 TV Ad (USA)Series 2 RX7 TV Ad II (USA)SA2=RX7
2=1146cc 12a Rotary
C=Coupe
###### =Serial/Chassis Number
May 1981 - June 1982
Chassis Numbers 60001 – 700000
In Australia SA22C was used instead of the US Govt mandated extended VIN.JM1FB331 BO######
Model: 1983Commonly known as Series 2SA2=RX7
2=1146cc 12a Rotary
C=Coupe
###### =Serial/Chassis Number
May 1981 - June 1982
Chassis Numbers 70001 – 800000
In Australia SA22C was used instead of the US Govt mandated extended VIN.JM1FB331 BO######
Model: 1984Commonly known as Series 3SA2=RX7
2=1146cc 12a Rotary
C=Coupe
###### =Serial/Chassis Number
September 1983 - July 1984
Chassis Numbers 800001 – 850000
In Australia SA22C was used instead of the US Govt mandated extended VIN.JM1FB331 BO######
Model: 1985Commonly known as Series 3SA2=RX7
2=1146cc 12a Rotary
C=Coupe
###### =Serial/Chassis Number
July 1984 - May 1985
Chassis Numbers 850001 – 899999
In Australia SA22C was used instead of the US Govt mandated extended VIN.JM1FB331 BO. The FB Prefix was also used on models released in Greece######
Sport $19,490
Delux $20,300
Limited $21,990
Finale $?????? only 150 made,unique black-outs outside of car, badge on pass door trim saying ...#/150 "last of the legends "
Specs on the S3 Sport:5.5 x 14" steel wheels
no washers on the front bar
no electrics in the interior
No rear wipers
S1 style seats(one piece no head rests)
rear foam spoiler
These sports models were only mentioned in the standard S3 brochure, they had their own "Sports brochure" its black and white.
If anyone's got a copy post it up please.

These are some rare articles from my large road test collection, enjoy..
Take you time and read these , the S3 rx-7 was/is a great sports car!

Here is another test with the same car,however this time the rx-7 is up against some very tough competition !
Colour Chart
First Gen Competition Manual1979 Wiring DiagramFirst Gen Work Shop ManualInteresting US First Generation InfoNissan R31 Struts into first gen RX71st Gen Handling ThreadHard to get brake parts (Mazdatrix USA)What fits whatSeries 1 - Series 2
Wheels both 110mm PCD
Front brakes/hub rotor assy
S2 (55ltr) Fuel Tank to S1 (55ltr) : Best to use sender type specified for each tank for accurate gauge readings.
Diff Centers S1 to S2
Seats S1 - S3
Dash Pads S1 - S3
Tail shaft S1 - S2
What can fitRear End Solid Disc Brake
S2 to S1 : Requires adaptor hose*.
Brake Master Cylinder
S2 to S1 : Requires new brake lines to Metric Fine, also front and rear chambers are opposed.
Clutch Master Cylinder/Slave Cylinder
S2-3 to S1 : Requires adaptor hose* or whole variant change... No mix and match!
Gear Boxes
S2 to S1 : Requires gear shift hole enlarged to rear.
Motor
S2/3 to S1 (long port/extra 10Kw) : Consideration for oil cooler, Distributor/Ignitors.
Rear End Vented Disc Brake
S3 to S1-2 : Requires S3 Tail shaft or modified end to S1/S2 shaft. Also requires adaptor hose.
Front Struts
S3 to S1-2 (larger front brake rotors) : Requires adaptor hoses*
Steering Column/Shaft/Ignition Lock Housing
S2 to S1 : Must be changed as a whole Assy... No mix and match!
Wheels and Bolts S1 to S2 (S2 are much shorter): No mix and match!
Wiring Loom
S2 to S1 : Firewall Grommets are round on S1 vs. rectangular (longer) on S2, best to cut out S2 panels as fillers. Rear light plugs are basically the same on S1, S2 and S3.
*Series 1 uses Metric Course threads on the brake and clutch hydraulic systems where S2-3 use Metric Fine Threads.
ENZED can usually supply either rubber or ADR approved Braided replacement lines same day.
What won't fitPedal Box
S2-3 to S1
Brake Booster
S2-3 to S1
Front Shock Inserts
S2 to S1 (different lengths)
Wheels
S1-2 (110mm PCD) to S3 (114.3mm PCD)
Rear Lights
S2-3 to a S1
S1/S2
Fuel Tank from S3 as it is larger (S3 has
Space Saver spare tyre)
What looks different or visually determines specific models
1978 Savanna RX7's some of which found there way to Australia and are different to a S1 by:Savanna has chrome number plate light lamps and side repeater/indicators in front guard/s (Aus delivered has no repeaters) Savanna has 180kph on speedo Aus delivered has 210kph
Originally had wing mirrors (mirrors mounted on front guards)
Light weight doors (No side intrusion bars)
Rear brake drums not ribbed for cooling
CreditsThank you to the following contributors:
Jobro engine information
1980rx-7 colour chart and competition and wiring link manuals
13BEEF Savanna RX7 information
BradRX7 Savanna RX7 information & confirmation
AD RX Series RX7 information & confirmation
Nickerz Series 3 RX7 Fuel Tank information & confirmation
1980rx-7 First Generation Workshop Manual Link
baltsiotis FB Model Prefix Info Greece
Sammy BSavanna Rear Shot
R2 CoupeUS First Gen Info