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IMPROVING THE PERFORMANCE OF POPULAR CARS

CONNAUGHT GT Citroen

autocar.jpg Slough-built D Series Connaught lgo

ON the Continent it is possible to specify a manual gear change with conventional clutch operation when buying a Citroen DS, as many potential owners have been put off by the strange semi-automatic transmission with its rather slow reflexes. Well aware of this state of affairs, Connaught Cars (1959) Ltd., Send, Woking, Surrey, are offering a model having almost the same specification as this “manual” DS, with many detail improvements and substantially better performance. Including purchase tax, the price is £1,597 19s 7d, just £29 more than a DS.

Each car starts life as a Citroen ID, to which the DS power-assisted circuits for brakes and steering are added. The all-synchromesh, four-speed gearbox with steering column lever is retained, but a DS instrument panel and dashboard are substituted, and Microcell Contour Seven reclining bucket seats replace the normal front ones.

The engine receives the full Connaught treatment, comprising a modified cylinder head with an increased compression ratio of 8-4 to 1 and twin Solex carburettors (S.U.s are optional); the flywheel is lightened to give a more lively engine response.

As soon as one starts up, the differences from normal IDs and DSs are immediately noticeable, although the characteristic engine harshness is still there. Accelerating hard in the lower gears produces all the Citroen tremors, but the performance is decidedly crisp as the table of figures below shows. Maximum speed is increased by just over 17 m.p.h., and acceleration from rest to 80 m.p.h. is improved by almost 27 per cent.

Although geared for the open road, the car is quite tractable if one makes free use of the ratios. The shape of the torque curve is remarkably flat, as illustrated so well by the even times taken to cover 20 m.p.h. speed ranges in the gears. Maximum revs are in the region of 6,500 r.p.m., but little, if anything, is gained by hanging on to this point except in first. It was found best to make the other changes at 5,800 r.p.m., and the corresponding road speeds are those quoted as the maxima.

The extra power emphasizes the outstanding roadholding potential of the car, and the small wood-rimmed steering wheel is a great improvement over the standard, single-spoked one with its thick plastic binding. By having a flat instead of a dished design, a full-reach driving position can be adopted, giving a greater sense of command when hurtling the car through sweeping bends—-conditions when it is really in its element. The new seats give good support, but most drivers found the cushion too high under their thighs; Connaught can easily adjust this to individual fit during the installation.

It seems a pity that the opportunity of improving the pedal layout has not been taken, for the present arrangement becomes fatiguing on long runs. Brake, clutch and throttle are all on different levels, and the last two have long movements which, while making them sensitive and light to operate, call for muscular agility.

More like a DS than an ID, the interior is given a very businesslike look by the wood-rimmed steering wheel and separate bucket seats
The two Solex carburettors are just visible in the complex jungle of accessories and cables. Extra sound deadening material is applied under the bonnet lid

This treatment of the Citroen by Connaught makes the car a real “road burner”  with a genuine 100 m.p.h. reached easily on motorways and held at a mere 4,325 r.p.m. For touring in the grand manner, the G.T. is very attractive: nearly 24 m.p.g. driven very hard and high average speeds without strain are virtues that seldom go hand in hand.  

Figures in brackets are for the Citroen ID tested in Autocar of 29 August 1958

From rest through gears to:

Acceleration times (mean): Speed range, gear ratios and time in seconds

30 m.p.h.

5.2 sec

(6.1 sec)

m.p.h.

3.31

4.77

7.35

13.79

40 m.p.h.

8.2 sec

(9.9 sec)

10-30

-

-

6.1 (6.8)

4.1 (-)

50 m.p.h.

11.8 sec

(14.0 sec)

20-40

15.9 (-)

9.8 (10.4)

6.0 (7.0)

-

60 m.p.h.

16.3 sec

(21.1 sec)

30-50

16.0 (18.2)

9.3 (10.9)

6.3 (8.0)

-

70 m.p.h.

23.2 sec

(30.7 sec)

40-60

16.4 (20.5)

9.7 (11.8)

7.9 (-)

-

80 m.p.h.

31.3 sec

(42.7 sec)

50-70

17.9 (22.4)

11.4 (15.8)

-

-

90 m.p.h.

55.8 sec

(-)

60-80

20.6 (33.7)

14.4 (21.5)

-

-

Standing quarter-mile 20.4 sec (22.3 sec)

70-90

32.4 (-)

23.7 (-)

-

-

Maximum speeds in gears:

Overall fuel consumption for 956 miles:


m.p.h.

k.p.h.

23.6 m.p.g.; 12.0 litres/100 km. (26.3 m.p.g.; 10.7 litres/100 km)

Top (mean)

102.6 (86.5)

165.1 (139.2)






Top (best)

104.0 (88.0)

167.4 (141.6)






3rd

92 (87)

148 (140)






2nd

60 (60)

97 (97)






1st

36 (30.)

58 (48)


© 2017 Citroënët/1963 Autocar