Alvis TD 21
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| Manufacturer | Alvis Cars |
|---|---|
| Type | Luxury car |
| Production | 1958–1963 |
| Produced | 1070 |
| Body style | 2 door saloon, Drophead coupé |
| Layout | FR layout |
| Engine | Alvis 3.0 L Straight-6 |
| Transmission | 4 speed manual, automatic |
| Wheelbase | 111.5 in (2,832 mm) |
| Length | 188.5 in (4,788 mm) |
| Width | 66 in (1,676 mm) |
| Height | 57 in (1,448 mm) |
The Alvis TD21 also called the Alvis Three Liter Series II, was a British sporting car made by Alvis cars between 1958 and 1963.
History
The Alvis TD21 was an updated version of the TC 108G with body construction by Park Ward who were better able to supply them to the quantity, quality and price required.They were slightly taller and a drophead coupé was added to the range.
The 2993 cc engine was again uprated, now producing 115 bhp (86 kW) mainly by an improved cylinder head and increasing the compression ration from 8.0:1 to 8.5:1.
PERFORMANCE:
Fuel Consumption: 20.0 m/imp gal, 16.7 m/US gal, 14.1 | x 100 km;
Max speed: 108 mph, 165 km/h;
max power (SAE): 124 hp at 4000 rpm
max torque (SAE): 152 1b ft, 21.0 kgm at 2500 rpm
max number of engine rpm: 5000
max speed in 1st gear: 38 mph, 61.2 km/h
max speed in 2nd gear: 58 mph, 93.4 km/h
max speed in 3rd gear: 84 mph, 135.2 km/h
max speed in 4th gear: 102.5 mph, 165 km/h
power-weight ratio: 26.2 lb/hp, 11.9 kg/hp
useful load: 882 1b, 400 kg
acceleration: standing 1/4 mile 19.5 sec O— 50 mph (0 —80 km/h) 9.5 sec
A new four speed gearbox from the Austin-Healey appeared and Borg Warner three speed automatic transmission was offered. Overdrive was available on the manual transmission from late 1960 to 1962. Suspension was similar to the TC 21, independent at the front using coil springs with leaf springs at the rear but the track was increased by 1 in (25 mm) to 55.5 in (1,410 mm) and a front anti roll bar added. Wire spoked wheels became an option. From 1959 the all drum brake set up was changed to discs at the front retaining drums at the rear.
VARIATIONS AND OPTIONAL ACCESSORIES:
Laycock-de Normanville overdrive on 3 and 4th, ratio 0.8
Borg-Warner automatic gear box, hydraulic torque convertor and planetary gears with 3 ratios (1st 2.308, 2nd 1.435, 3rd 1, Rev 2.008),
axle ratio 3.54 : 1.
Series II
In January 1962 the car was upgraded to the TD 21 Series II with four wheel disc brakes and in October that year a five speed manual ZF gearbox. The previously stand alone fog lamps were built into the front of the car.
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Technical
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Alvis TD 21 Technical details and specifications (1958-1963)
ENGINE:
ENGINE CAPACITY: 183.05 cu in, 2993 cu cm
front, 4 stroke
cylinders: 6, in line
bore and stroke: 3.31 x 3.54 in, 84.1 x 89.9 mm
engine capacity: 183.05 cu in, 2993 cu cm
compression ratio: 8.5 : 1
cylinder block: cast iron, wet liners
cylinder head: cast iron
crankshaft bearings: 7
valves: 2 per cylinder, overhead, parallel, with push-rods and rockers
camshaft: 1, side
lubrication: gear pump, full flow filter
lubricating system capacity: 6.5 imp qt, -7.8 US qt, 7.4 1
carburation: 2 SU type H6 carburettors
fuel feed: mechanical pump
cooling system: water
TRANSMISSION:
driving wheels: rear
clutch: single dry plate
gear box: mechanical; gears: 4 + reverse
synchromesh gears: 1, 2, 4
gear box ratios: (1) 2.928, (2) 2.053, (3) 1.308, (4) 1, (Rev) 3.780
gear lever location: central
final drive: hypoid bevel;ratio: 3.77 : 1.CHASSIS:
box-type frame, cross members
front suspension: independent, wishbones, coil springs, anti-roll bar, telescopic dampers
rear suspension: rigid axle, semi-elliptic leafsprings, telescopic dampers.STEERING:
recirculating ball
turns of steering wheel lock to lock: 3.3.BRAKES:
disc, servo.ELECTRICAL EQUIPMENT:
voltage: 12 V
battery: 51 Ah
dynamo: 300 W
ignition distributor: LucasDIMENSIONS AND WEIGHT: saloon & convertible
wheel base: 111.50 in, 2832 mm
front track: 55.62 in, 1413 mm
rear track: 54.12 in, 1375 mm
overall length: 188.50 in, 4788 mm
overall width: 66.00 in, 1676 mm
overall height: 60.00 in,1524 mm
ground clearance: 7.00 in, 178 mm
dry weight: 3248 1b, 1473 kg
distribution of weight: 52% front axle, 48% rear axle
turning radius (between walls): 21.0 ft, 6.4 m
width of rims: 4.5"© Motor car History
Service
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Alvis TD 21 Service instructions (1958-1963)
fuel: petrol, 85-90 Oct
engine oil: 6.0 imp qt, 7.2 US qt, 6.8 1, SAE 20-30 (winter) 30-40 (summer), change every 2000 miles, 3200 km
gearbox oil: 2.3 imp qt, 2.7 US qt, 2.6 1, SAE 30, change every 5000 miles, 8000 km
final drive oil: 1.8 imp qt, 2.1 US qt 2 1, SAE 90, change every 5000 miles, 8000 km
greasing: every 1000 miles, 1600 km, 22 points;
tappet clearances: inlet 0.009 in, 0.23 mm hot, exhaust 0.012 in, 0.30 mm hot;
valve timing: (inlet) opens 130 before tdc and closes 460 after bdc, (exhaust)opens 53° before bdc and closes 6° after tdc
tyre pressure (medium load): front 26 psi, 1.8 atm, rear 28 psi, 2.0 atm.
tyres: 6.00/6.40 - 15
fuel tank capacity: 14.30 imp gal, 17.16 US gal, 65 1.© Motor car History