CARCARETOOL VEHICLE GUIDE

Jaguar 340

Jaguar 340 — 4-door saloon, 2.8 L ''XK'' I6; 4.2 L ''XK'' I6; 5.3 L ''Jaguar V12'' (from 1972). Explore engine specifications, fuel economy, dimensions, tire sizes, seating, maintenance and tire-pressure guidance.

Engine2.8 L ''XK'' I6; 4.2 L ''XK'' I6; 5.3 L ''Jaguar V12'' (from 1972)

Transmission3-speed ''Borg-Warner Model 8'' automatic (1968–1970); 3-speed ''Borg-Warner Model 12'' automatic (1970 onwards)Manual 4 speed +OD available on I6 models

About the Jaguar 340

Jaguar 340 is a 4-door saloon in the sedan class. The available vehicle data lists 2.8 L ''XK'' I6; 4.2 L ''XK'' I6; 5.3 L ''Jaguar V12'' (from 1972) as an engine configuration, paired with 3-speed ''Borg-Warner Model 8'' automatic (1968–1970); 3-speed ''Borg-Warner Model 12'' automatic (1970 onwards)Manual 4 speed +OD available on I6 models. Public source material describes the model in the context of its design, market positioning and vehicle history.

This Jaguar 340 guide focuses on the details drivers commonly want to know, including engine information for 2.8 L ''XK'' I6; 4.2 L ''XK'' I6; 5.3 L ''Jaguar V12'' (from 1972) and 3-speed ''Borg-Warner Model 8'' automatic (1968–1970); 3-speed ''Borg-Warner Model 12'' automatic (1970 onwards)Manual 4 speed +OD available on I6 models transmission information. Exact specifications should be matched to the relevant model year and market.

Jaguar 340 specifications at a glance

Use this table for the model-level essentials. Exact figures may vary by year, trim, engine and market.

Make	Jaguar
Model	340
Model years	Not specified
Body style	4-door saloon
Vehicle class	sedan
Manufacturer	Jaguar
Production	1968–197382,126 produced
Market / country	GB, NL, NZ

Engine, transmission and performance

Engine information for the Jaguar 340 includes 2.8 L ''XK'' I6; 4.2 L ''XK'' I6; 5.3 L ''Jaguar V12'' (from 1972).. Transmission information includes 3-speed ''Borg-Warner Model 8'' automatic (1968–1970); 3-speed ''Borg-Warner Model 12'' automatic (1970 onwards)Manual 4 speed +OD available on I6 models.

Engine	2.8 L ''XK'' I6; 4.2 L ''XK'' I6; 5.3 L ''Jaguar V12'' (from 1972)
Transmission	3-speed ''Borg-Warner Model 8'' automatic (1968–1970); 3-speed ''Borg-Warner Model 12'' automatic (1970 onwards)Manual 4 speed +OD available on I6 models

Dimensions, weight and practicality

Dimensions and capacity figures are presented as published source data when available.

Wheelbase	108.75 in (2,762 mm); '''LWB (sold from 1972):''' 112.75 in (2,864 mm)
Length	189.5 in (4,813 mm); '''LWB (sold from 1972):''' 193.5 in (4,915 mm)
Width	69.75 in (1,772 mm)
Height	52.75 in (1,340 mm)

Jaguar 340 other specifications

Name	XJ Series I
Image	1971-1973 Jaguar XJ6 2.8, front left (Hamburg).jpg
Aka	Jaguar XJ6/XJ12; Daimler Sovereign; Daimler Double-Six
Sp	uk

Jaguar 340 generations and model years

Where a source covers multiple generations, CarCareTool selects the generation(s) that best match this catalog model instead of mixing unrelated variants.

Generation / scope	Years	Engine	Transmission	Drivetrain
XJ Series I	1968–197382,126 produced	2.8 L ''XK'' I6; 4.2 L ''XK'' I6; 5.3 L ''Jaguar V12'' (from 1972)	3-speed ''Borg-Warner Model 8'' automatic (1968–1970); 3-speed ''Borg-Warner Model 12'' automatic (1970 onwards)Manual 4 speed +OD available on I6 models	Not specified

TIRE PRESSURE

Recommended tire pressure for Jaguar 340

Check the vehicle placard or owner’s manual for the manufacturer’s cold inflation pressure. CarCareTool estimates are clearly labelled when an exact verified value is unavailable.

Normal load32 PSI front30 PSI rear

Fully loaded34 PSI front33 PSI rear

Load condition	Front	Rear	Status
Normal	32 PSI	30 PSI	Estimate
Fully loaded	34 PSI	33 PSI	Estimate

Calculate how much air to add

Frequently asked questions about Jaguar 340

These FAQs are generated automatically for this specific vehicle from the specifications, features and ownership data available in CarCareTool. Questions are selected by relevance so the page focuses on details that can actually be answered for this model.

What engine does the Jaguar 340 have?

The available source data lists the Jaguar 340 engine as 2.8 L ''XK'' I6; 4.2 L ''XK'' I6; 5.3 L ''Jaguar V12'' (from 1972). Engine availability can differ by model year and market.

What tire pressure should I use for the Jaguar 340?

For the correct setting, use the cold inflation pressure on the vehicle placard or in the owner’s manual. When CarCareTool does not have a verified configuration-specific value, its starting estimate is 32 PSI front and 30 PSI rear for normal load. This is an estimate, not an OEM recommendation.

What is the best engine oil for the Jaguar 340?

There is no single best engine oil for every Jaguar 340 configuration. Use the viscosity grade and manufacturer approval specified for the exact engine in the owner’s manual.

What body style is the Jaguar 340?

The Jaguar 340 is classified as a 4-door saloon.

What are the dimensions of the Jaguar 340?

The available source data lists length 189.5 in (4,813 mm); '''LWB (sold from 1972):''' 193.5 in (4,915 mm), width 69.75 in (1,772 mm), height 52.75 in (1,340 mm), and wheelbase 108.75 in (2,762 mm); '''LWB (sold from 1972):''' 112.75 in (2,864 mm).

What transmission does the Jaguar 340 have?

The available source data lists 3-speed ''Borg-Warner Model 8'' automatic (1968–1970); 3-speed ''Borg-Warner Model 12'' automatic (1970 onwards)Manual 4 speed +OD available on I6 models transmission options for the Jaguar 340.

Who makes the Jaguar 340?

The manufacturer listed for the Jaguar 340 is Jaguar.

When was the Jaguar 340 produced?

The available source data describes production as 1968–197382,126 produced.

Where was the Jaguar 340 built?

The available source record lists assembly information as United Kingdom: Coventry, England.

What class of car is the Jaguar 340?

The Jaguar 340 is listed in the sedan class.

Which markets or countries sold the Jaguar 340?

The CarCareTool catalog currently associates the Jaguar 340 with GB, NL, NZ. Market availability and specifications can differ.

What replaced the Jaguar 340?

The available vehicle data lists a later model or generation as the successor where applicable.

How often should I check the tire pressure on the Jaguar 340?

Check the tires regularly and before long trips, with the tires cold. Use the vehicle placard or owner’s manual as the source of the manufacturer’s recommended pressure.

Should I use the tire sidewall pressure for the Jaguar 340?

No. The maximum pressure printed on the tire sidewall is not automatically the vehicle’s recommended setting. Use the vehicle placard or owner’s manual for the correct cold inflation pressure.

Does the recommended tire pressure change when the Jaguar 340 is fully loaded?

It can. Many vehicles specify a different cold pressure for heavier loads. Check the vehicle placard or owner’s manual for the exact loading condition.

Can the Jaguar 340 have different tire pressures front and rear?

Yes. Some vehicles specify different front and rear pressures because axle loads and vehicle configurations differ. Follow the exact vehicle recommendation where available.

Why can mileage differ from the published figure for the Jaguar 340?

Published fuel economy is measured under a defined test method. Real-world mileage can vary with traffic, speed, temperature, tire pressure, payload, maintenance and driving style.

Data sources and verification are available in the page editor; exact specifications can vary by year, market, trim and engine.

Jaguar 340 images

Vehicle images are shown from the stored source image records when available.