Automotive Calculators

Calculators and convertors to work out:

Engine Codes

Code	Model	Engine	BHP	Dates
4-9	Type 1/2	1200 SP	34	May ’59 > Aug ’65
E	Type 1	1300 SP	37	Aug ’65 > Jul ’70
B	Type 2	1600 SP	47	Aug ’67 > Jul ’70
FO	Type 1	1300 SP	40	Aug ’65 > Jul ’70
H	Type 1	1500 SP	44	Aug ’65 > Jul ’70
H	Type 2	1500 SP	44	Aug ’65 > Jul ’68
L	Type 2	1500 SP	40	Nov ’65 > Jul ’68
AB	Type 1	1300	44	Aug ’70 > Jul ’73
AC	Type 1	1300	40	Aug ’70 > Jul ’70
AD	Type 1/2	1600	50	Aug ’70 > Jul ’73
AE	Type 1	1600	47	Aug ’70 > Jul ’71
AF	Type 1/2	1600	46	Aug ’70 > Jan ’80
AH	Type 1	1600	47	Aug ’71 > Jan ’76
AJ	Type 1	1600	50	Aug ’74 > Dec ’80
AK	Type 1	1600	47	Aug ’72 > Jul ’73
AR	Type 1	1300	44	Aug ’73 > Jul ’75
AS	Type 1/2	1600	50	Aug ’73 > Jul ’79
CJ	Type 2	2000	70	Aug ’75 > Jul ’79

Ratios & Speed

This will calculate the rpm for any given gear and any given speed, or speed to rpm. Simply fill in the tyre setup then fill in the calculation fields leaving the field you want to calculate empty. Use the transmission table below for reference.

1. Tyre Setup
80% is standard tyre profile
Tyre Width	Tyre Profile	Rim Size
Select 125 135 145 155 165 175 185 195 205 215 225 235 245 255 265 275 285 295 mm	30 35 40 45 50 55 60 65 70 75 78 80 82 %	10″ 11″ 12″ 13″ 14″ 15″ 16″ 17″ 18″ 19″ 20″ 21″
2. Calculate
Tyre code:		Calc.
Gear Ratio:	:1
Final Drive:	:1
RPM:
Speed:	km/h mph

Typical Transmission Ratios

Vehicle	1st	2nd	3rd	4th	Rev.	FD
Type 1 – Beetle
1.2 30 BHP >’60	3.60	2.07	1.25	0.80	6.60	4.375
1.2 34 BHP ’60>	3.60	1.88	1.22	0.89	4.63	4.375
1.3 >’66	3.80	2.06	1.32	0.89	3.88	4.375
1.5 >’66	3.80	2.06	1.32	0.89	3.88	4.125
1.3 ’66>	3.80	2.06	1.26	0.89	3.61	4.375
1.5 ’66>	3.80	2.06	1.26	0.89	3.61	4.125
1303	3.80	2.06	1.26	0.93	3.80	3.875
Auto ’70-79	2.06	1.26	0.89	–	3.07	4.125
Type 2 – Split Screen
36 BHP	3.60	1.88	1.22	0.79	4.63	4.375×1.40=6.125
’60-’61	3.80	2.06	1.32	0.89	3.88	4.125×1.39=5.73
’65	3.80	2.06	1.21	0.82	3.88	4.125×1.26=5.20
’66-’67	3.80	2.06	1.26	0.82	3.88	4.125×1.26=5.20
Type 2 – Transporter ’68-’79
1.6/1.7	3.80	2.06	1.26	0.82	3.80	5.375
1.8	3.80	2.06	1.26	0.89	3.79	5.492
2.0	3.80	2.06	1.26	0.89	3.61	4.857
Auto 2.0	2.55	1.45	1.00	–	2.46	4.26 or 4.45
Other autos	2.65	1.59	1.00	–	1.80	4.36 or 4.45
Type 3 – Fastback, Notchback and Variant
’65-67	3.80	2.06	1.32	0.89	3.87	4.125
’71-’72	3.80	2.06	1.26	0.88	3.61	3.875
’72-’77	3.78	2.06	1.26	0.89	3.79	3.875
Karmann Ghia
1956	3.60	1.88	1.23	0.82	4.63	4.43
New Beetle
1.8T	3.30	1.94	1.31	5th 0.84	3.06	3.94

Fuel Consumption

Calculate your mpg. Tip: You can enter an mpg figure in the MPG field to just convert to Metric and U.S.

Fuel bought in pence:	p (i.e. 1200 = £12)
Pence per litre:	p
Miles travelled:
MPG:	Imperial gallons
Convert Result
Litres/100Km:		MPG:

Tyre Heights

Compare different tyre and wheel combinations. To keep speedometer readings accurate keep to within 2.5%.
NB Not all combinations are available as tyre sizes. A tyre profile of 80%-82% is considered standard size.

Original Tyre Size
Width mm 305 295 285 275 265 255 245 235 225 215 205 195 185 175 165 155 145 135	Profile % 82 80 78 75 70 65 60 55 50 45 40 35 30	Rim ⌀ 20″ 19″ 18″ 17″ 16″ 15″ 14″ 13″ 12″ 10″	Inch	mm
New Tyre Size
Width mm 305 295 285 275 265 255 245 235 225 215 205 195 185 175 165 155 145 135	Profile % 82 80 78 75 70 65 60 55 50 45 40 35 30	Rim ⌀ 20″ 19″ 18″ 17″ 16″ 15″ 14″ 13″ 12″ 10″	Inch	mm
Difference in Diameter:
%		=	mm

Distance

Convert miles to kilometers and kilometers to miles.

Miles

Km