Westfield SEi & Sport: which version to buy
If you are shopping a Westfield SEi & Sport from this catalogue, the choice is already made for you: there is one generation (1982-01-01 to 1991-12-31) and one named version, 1.8 MT. That is not a gap in this buying guide; it is the data. You are not comparing two Westfield SEi & Sport engines, two gearboxes, or two generations.
If you are shopping a Westfield SEi & Sport from this catalogue, the choice is already made for you: there is one generation (1982-01-01 to 1991-12-31) and one named version, 1.8 MT. That is not a gap in this buying guide; it is the data. You are not comparing two Westfield SEi & Sport engines, two gearboxes, or two generations. You are deciding whether 1.8 MT’s measured numbers — 116 hp, 162 Nm, 1796 cm³, 600 kg kerb, 6.6 s to 100 km/h, 177 km/h — match what you will actually use, and which of those numbers are not measured.
There is no second Westfield SEi & Sport version in the file to “spend extra money” on. Arithmetic below is therefore inside 1.8 MT: power per litre, mass per horsepower, payload, how much of the 850 kg gross figure is left after 600 kg kerb. Those ratios are the buying decision.
Specs that decide the buy: 1.8 MT
1.8 MT is Gasoline, 1796 cm³, 4 cylinders, Inline, 4 valves per cylinder, boost No, Distributed injection (multi-point), compression ratio 10, bore and stroke 80.6 × 88, fuel 95. Output is 116 hp (85 kW) at 6250 rpm and 162 Nm at 4250 rpm. The gearbox is Manual, 5 speeds. Drive is RWD. Body for the generation is Cabrio.
Engine location is not measured. Wheel sizes are not measured. Combined, city, and highway fuel use are not measured. CO2 is not measured. Eco class is not measured. If your purchase hangs on mpg, tyre size, or where the engine sits in the chassis, this catalogue cannot settle it: those fields are empty, not “typical for the class.”
What is measured is enough to rank 1.8 MT as a light, short-geared Cabrio rather than a heavy tourer: 600 kg kerb, 50 L tank, 160 mm ground clearance, Independent, spring front and rear, Disc front and Disc rear.
Generations: what changed (and what did not)
Westfield SEi & Sport has 1 generation in the data. Start 1982-01-01, stop 1991-12-31. Body: Cabrio. Versions in that generation: 1. There is no restyle row and no second generation, so there is no “later chassis” or “updated engine” to prefer.
That means generation-to-generation shopping does not apply. You cannot buy a facelift for more power, a later automatic, or a later AWD pack: those items are not in the list. The whole production window in this file is the same 1.8 MT Cabrio. If a seller labels a car “Sport” versus “SEi,” this dataset does not split them into different hp, Nm, or weight lines. The named modification you can match to a spec sheet is 1.8 MT.
Engine and gearbox: only 1.8 MT
| Version | hp | Nm | cm³ | Fuel | Cylinders | Layout | Boost | Gearbox | Drive |
|---|---|---|---|---|---|---|---|---|---|
| 1.8 MT | 116 | 162 | 1796 | Gasoline | 4 | Inline | No | Manual, 5 | RWD |
1.8 MT is 116 / 1.796 ≈ 64.6 hp per litre and 162 / 1.796 ≈ 90.2 Nm per litre. Peak power is at 6250 rpm; peak torque is at 4250 rpm — 2000 rpm apart. The stroke (88 mm) is longer than the bore (80.6 mm) by 7.4 mm. Compression is 10. Boost is No, so you are not buying a forced-induction step-up; the 116 hp figure is the naturally aspirated number in the file.
Gearbox choice is not a choice: 1.8 MT is Manual, 5. There is no Automatic row to trade against. Drive is RWD only. If you need more than five forward gears, a self-shifter, or a driven front axle, this model’s catalogue version does not offer them.
Fuel is 95. Injection is Distributed injection (multi-point). Cylinders: 4, Inline, 4 valves per cylinder. Do not invent a bank count or a “six” — the file says 4 and Inline.
Performance vs economy: what 1.8 MT actually posts
1.8 MT reaches 100 km/h in 6.6 s and a top speed of 177 km/h. Those two figures are measured. Fuel consumption in the city is not measured. On the highway it is not measured. Combined it is not measured. CO2 is not measured. Eco class is not measured.
A buying comparison that uses mpg or g/km against another car cannot use this file for the Westfield side. The honest statement is: acceleration and top speed are known; economy is not. If running cost is the reason you are comparing versions, 1.8 MT does not give you a number to compare.
What you can compute is specific output versus mass. 600 kg ÷ 116 hp ≈ 5.17 kg per hp (kerb). 850 kg ÷ 116 hp ≈ 7.33 kg per hp at gross. 6.6 s to 100 km/h with 116 hp is consistent with that kerb figure being low, not with a large engine: 1796 cm³ is the only displacement in the table.
Top speed 177 km/h versus 116 hp is the other half of the same picture: you are not buying a high-Vmax cruiser on these numbers. The performance case for 1.8 MT is the 6.6 s time and the 5.17 kg/hp kerb ratio, not a consumption score (absent) and not a second, stronger engine (absent).
Dimensions, weight, tank: what the extra 250 kg is for
Kerb weight of 1.8 MT is 600 kg. Gross weight is 850 kg. The difference is 250 kg of payload (people, fuel, luggage) before the catalogue’s full-mass figure. Ground clearance is 160 mm. Fuel tank is 50 L. Wheel sizes are not measured.
600 kg is 70.6% of 850 kg; 250 kg is 29.4% of gross. If two occupants plus a full 50 L tank already eat a large share of 250 kg, the remaining allowance is small — that is arithmetic on the given masses and tank, not a loading table (which is not measured beyond those two mass figures).
Clearance 160 mm is the only ride-height number. There is no second generation with a different clearance to pick. Suspension is Independent, spring at both ends on 1.8 MT. Brakes are Disc front and Disc rear. You are not choosing drums at the rear versus discs; both axles in the file are Disc.
Tank 50 L with consumption not measured means range is not measured. Do not treat 50 L as “long range” or “short range”; without L/100 km the tank size is a volume, not a distance.
Which version to choose
Choose 1.8 MT because it is the only Westfield SEi & Sport version in the data: Gasoline 1796 cm³, 116 hp at 6250 rpm, 162 Nm at 4250 rpm, Manual 5, RWD, Cabrio, 1982-01-01–1991-12-31.
Use the numbers this way:
- Buy 1.8 MT if 6.6 s to 100 km/h, 177 km/h, ~64.6 hp/L, and ~5.17 kg/hp at 600 kg kerb are the point of the car, and you accept Manual, 5, RWD, fuel 95, boost No.
- Do not treat another Westfield SEi & Sport “trim name” as a different spec unless it matches 1.8 MT’s 116 hp / 162 Nm / 1796 cm³ line. This file has one modification, not two horsepower variants of the same name.
- Walk away on catalogue grounds if you need a measured mpg, CO2, eco class, wheel size, or engine location — all not measured — or if you need an Automatic, more than 5 gears, a non-RWD layout, a second generation, or a second engine. None of those exist here to pay extra for.
There is no “which generation” fork: 1 generation, Cabrio, one version. There is no “what the extra money buys” between two listed cars: the extra money would be outside this table. The comparison that is allowed is 1.8 MT against its own ratios: 116 hp from 1796 cm³, 162 Nm, 600 vs 850 kg (250 kg spread), 50 L tank, 160 mm clearance, 6.6 s, 177 km/h. That is the buy, or it is not.