Mark 10

From 1961 to 1968

For the 1960s Jaguar needed something new for the flagship saloon in the range so the Mark X took on the mantle. Introduced at the British Motor Show in 1961, apart from the  existing 3.8 litre XK engine (now equipped with triple carburettors). the car was all new. A monocoque body shell of vast proportions, carrying the accolade of being the widest production saloon ever produced in the UK at the time, the styling incorporated a four headlight frontal treatment with shallow forward sloping grille and a one piece hinged bonnet. With bulbous sides to allow extra interior width in the car, an extra larger boot area and massive sills to retain rigidity, the car was stylistically still very attractive. 

Built with Jaguar’s prime USA market in mind, the car even carried 14” wheel rims, the norm for American cars at the time. It was perhaps because of its immense size that the car wasn’t as popular as Jaguar would have hoped. Too wide for many British roads and private garages, and too trans-continental in looks to suit the Americans concept of a luxury British saloon. 

Nevertheless the car was a superb, well equipped model which would finally see off most British competition from the likes of Armstrong Siddeley, Humber and even Daimler. 

The model was upgraded with the 4.2 litre engine in 1964 along with an all synchromesh manual gearbox, improved brakes and power steering

Model Summary

Model Type:

Mark 10/420G/DS420

Production Dates:

1961 - 1968

Engine Range:

3.8 Litre Saloon

4.2 Litre Saloon

0 - 60 mph:

3.8 Litre Saloon - 9.1 seconds

4.2 Litre Saloon - 9.9 seconds

Top Speed:

3.8 Litre Saloon - 119.5 mph

4.2 Litre Saloon - 121.5 mph

Mark 10 Technical Specifications

Technical Information

Engine Statistics

 3.8 Litre Saloon
Engine (cc)3781
Bore and Stroke (mm)87 x 106
Compression Ratio8:1 (7:1/9:1 optional)
BHP265
@ RPM5500
Torque (lb ft)260
@ RPM4000
Fuelling3x SU carbs
 4.2 Litre Saloon
Engine (cc)4235
Bore and Stroke (mm)92.07 x 106
Compression Ratio8:1 (7:1/9:1 optional)
BHP265
@ RPM5400
Torque (lb ft)283
@ RPM4000
Fuelling3x SU carbs

Engine Performance

 3.8 Litre Saloon
Top Speed119.5 mph
0 - 60 mph9.1 seconds
Fuel Consumption14.1 mpg
 4.2 Litre Saloon
Top Speed121.5 mph
0 - 60 mph9.9 seconds
Fuel Consumption14.5 mpg

Model Specifications

 3.8 Litre Saloon
Transmission4-speed (3 synchro) BW 3-speed auto
Wheel Size (in)14, steel
Suspension (Front)Ind semi-trailing wishbones, coil springs, ant-roll bar
Suspension (Rear)Ind lower wishbone/upper driveshaft link, radius arms, coil springs
Brakes4-wheel disc, rear inboard
 4.2 Litre Saloon
Transmission4-speed (all synchro) BW 3-speed auto
Wheel Size (in)14, steel
Suspension (Front)Ind semi-trailing wishbones, coil springs, ant-roll bar
Suspension (Rear)Ind lower wishbone/upper driveshaft link, radius arms, coil springs
Brakes4-wheel disc, rear inboard

Model Dimensions

 3.8 Litre Saloon
Length (in)202
Width (in)76
Height (in)54.75
Wheelbase (in)120
Front Track (in)58
Rear Track (in)58
Weight (Cwt)37
 4.2 Litre Saloon
Length (in)202
Width (in)76
Height (in)54.75
Wheelbase (in)120
Front Track (in)58
Rear Track (in)58
Weight (Cwt)37

Optional Extras

  • Choice of three radio installations with or without rear parcel shelf-mounted speaker
  • Electric radio aerial
  • Wind-up radio aerial
  • Electrically operated windows (front and rear)
  • Laminated windscreen
  • Witter tow bar
  • Heated rear screen (earlier cars)
  • Front seat belts
  • Choice of radial, town and country, or whitewall tyres
  • Borg Warner automatic transmission
  • Overdrive (for non-overdrive-equipped manual transmission cars)
  • Fire extinguisher
  • Sundym tinted windscreen and side windows
  • Wing mirrors
  • Integrated ignition/starter switch to steering column
  • Limousine appointments (only available on ordering a new car)

Chassis Numbers

ModelDriver SideChassis No. CommencedNumber made
Mark X 3.8RHD3000019129
Mark X 3.8LHD3500013848
Mark X 4.2RHD1D500013720
Mark X 4.2LHD1D750011960
420GRHDG1D537205429
420GLHDG1D769611125

Mark 10 Events

Trackday 2

Ever thought of trying your car on the track or just want to experience the thrill in the hands of a professional tutor?Well now you can!...

Ever thought of trying your car on the track or just want to experience the thrill in the hands of a professional tutor?Well now you can!...

Jaguar Xkss In Front Of The Jaguar Classic Stand Chris Gage

The 2017 Jaguar Enthusiasts' Club Annual General Meeting at Jaguar Cars Limited, Castle Bromwich facility, Castle Vale, Birmingham, West Midlands.

The 2017 Jaguar Enthusiasts' Club Annual General Meeting at Jaguar Cars Limited, Castle Bromwich facility, Castle Vale, Birmingham, West Midlands.

Club News

Dsc 0133

Lancaster Insurance Classic Motor Show 2017, NEC is always a hectic affair for exhibitors and we at the Jaguar Enthusiasts' Club are no different. We are looking for volunteers to help for a couple of hours each day to help us out....

Lancaster Insurance Classic Motor Show 2017, NEC is always a hectic affair for exhibitors and we at the Jaguar Enthusiasts' Club are no different. ...

Dsc 1295

Book now for the classic event of 2018, Silverstone Classic. If you are a member of the JEC and want to come and enjoy the event, get your exclusive Club Code below and save ££'s. In 2018 we celebrate the 50th anniversary of the XJ and 70th birthd...

Book now for the classic event of 2018, Silverstone Classic. If you are a member of the JEC and want to come and enjoy the event, get your exclusiv...

P1130322
420 G Saloon

Model Contacts

Clive Clark

Mark 10 Forum Co-ordinator

@: mk10.jec@gmail.com

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