Daewoo Alpheon

Daewoo Alpheon: which version to buy — 2.4 AT vs 3.0 AT

The Daewoo Alpheon ran as 1 generation of Sedan from 2010-04-01 to 2015-10-31. There are 2 catalogue versions, both Gasoline, Automatic with 6 gears, FWD, No boost, Front, transverse engine, Distributed injection (multi-point), and a 70 L tank: 2.4 AT (185 hp, 238 Nm, 2384 cc, 4 Inline cylinders) and 3.0 AT (263 hp, 298 Nm, 2997 cc, 6 V-shaped cylinders).

The Daewoo Alpheon ran as 1 generation of Sedan from 2010-04-01 to 2015-10-31. There are 2 catalogue versions, both Gasoline, Automatic with 6 gears, FWD, No boost, Front, transverse engine, Distributed injection (multi-point), and a 70 L tank: 2.4 AT (185 hp, 238 Nm, 2384 cc, 4 Inline cylinders) and 3.0 AT (263 hp, 298 Nm, 2997 cc, 6 V-shaped cylinders). Acceleration to 100 km/h, top speed, fuel use, CO2, eco class, kerb weight, gross weight, ground clearance, and wheel sizes are not measured for either version, so the buying choice is engine output, cylinder count, and how densely each engine makes power — not a claimed 0–100 time or an mpg figure.

There is no second generation to “step up to.” Restyling is not listed as a separate generation. The question is only: 2.4 AT or 3.0 AT.

Generations: what changed (and what did not)

1 generation (2010-04-01–2015-10-31), Sedan, 2 versions. Both 2.4 AT and 3.0 AT share the same start and stop dates, so neither engine is a late-run replacement for the other. Chassis labels match: Independent, spring front and rear; Ventilated disc front brakes; Disc rear brakes. Drive, gearbox type, gear count, tank size, fuel (95), boost (No), engine position, and injection type are identical. The generation did not split the range into different drivetrains or body types. What the extra displacement buys is 78 hp and 60 Nm, plus two more cylinders in a V-shaped block instead of 4 Inline.

Engine specs: 2.4 AT vs 3.0 AT side by side

2.4 AT compression ratio is 10.4; bore × stroke is 88 × 98. For 3.0 AT both compression and bore × stroke are not measured. Valves per cylinder are 4 on both.

Power, litres, and what the extra money buys in numbers

Displacement gap: 2997 − 2384 = 613 cc (about 25.7% more swept volume on 3.0 AT).

Power gap: 263 − 185 = 78 hp (42.2% more). In kilowatts: 193 − 136 = 57 kW. Torque gap: 298 − 238 = 60 Nm (25.2% more). Power therefore rises faster than displacement and faster than torque. The extra 613 cc and two extra cylinders buy a larger relative jump in peak horsepower than in peak newton-metres.

Power per litre (hp ÷ litres, litres = cc / 1000):

• 2.4 AT: 185 / 2.384 ≈ 77.6 hp/L
• 3.0 AT: 263 / 2.997 ≈ 87.8 hp/L

3.0 AT is denser at the power peak by about 10.2 hp/L. Torque per litre:

• 2.4 AT: 238 / 2.384 ≈ 99.8 Nm/L
• 3.0 AT: 298 / 2.997 ≈ 99.4 Nm/L

Torque density is essentially the same (about 0.4 Nm/L apart). The 3.0 AT advantage is not “more twist per cubic centimetre”; it is more total twist from more cubic centimetres, plus a higher specific power figure.

Peak rpm:

• Power: 2.4 AT at 6700, 3.0 AT at 6900 (+200 rpm).
• Torque: 2.4 AT at 4900, 3.0 AT at 5600 (+700 rpm).

2.4 AT posts both peaks earlier. If the catalogue is used as a proxy for where the engine is working hardest, 2.4 AT is the lower-rpm peak of the pair; 3.0 AT asks for more revs to show 263 hp and 298 Nm. Neither version has a measured 0–100, so this is not a claim about which car is quicker off the line — only about where the given peaks sit.

Horsepower per cylinder:

• 2.4 AT: 185 / 4 = 46.25 hp per cylinder
• 3.0 AT: 263 / 6 ≈ 43.8 hp per cylinder

Torque per cylinder: 59.5 Nm vs 49.7 Nm. The Inline 4 in 2.4 AT is the harder-working cylinder; the V-shaped 6 in 3.0 AT spreads the load.

kW-to-hp check from the file (not a new measurement): 2.4 AT 136 kW vs 185 hp; 3.0 AT 193 kW vs 263 hp. Both sit on the same catalogue pair of units.

Performance and economy (mpg, 0–100, top speed)

For 2.4 AT and 3.0 AT: 0–100 is not measured; maximum speed is not measured; city, highway, and combined consumption are not measured; CO2 is not measured; eco class is not measured.

A buying article cannot rank “mpg” or “which is cheaper to run” from this file. Tank volume is 70 L on both, so range cannot be compared without a consumption figure. Do not treat a missing 0–100 as “this sedan has no acceleration” — the parameter exists in the catalogue and is simply not measured.

Dimensions, weight, clearance, wheels

Kerb weight: not measured for 2.4 AT and not measured for 3.0 AT. Gross weight: not measured on both. Ground clearance: not measured on both. Wheel sizes: not measured on both. Tank: 70 L on both.

Weight per horsepower cannot be calculated. You cannot say which version is “lighter per hp.” Chassis and brake labels do not differ, so the file does not show a heavier-duty axle or a different brake type on 3.0 AT.

Problems and reliability: what the specs do and do not tell you

This catalogue has no failure rates, recall lists, or workshop notes. Reliability cannot be scored from hp or cylinder count. Shared hardware that is listed: Automatic 6, FWD, Gasoline 95, No boost, Distributed injection (multi-point), Independent, spring suspension both ends, Ventilated disc front / Disc rear, 70 L tank, same production window.

Differences that can matter in a workshop sense only as hardware identity, not as a reliability verdict:

• 2.4 AT: 4 Inline, 2384 cc, 185 hp, 238 Nm, compression 10.4, bore × stroke 88 × 98.
• 3.0 AT: 6 V-shaped, 2997 cc, 263 hp, 298 Nm, compression not measured, bore × stroke not measured.

More cylinders and 613 cc extra is a different engine, not a tune of the same four. Boost is No on both, so neither is a turbocharged variant of the other.

Which version to choose

Choose 2.4 AT if the numbers you care about are displacement, cylinder count, and where the peaks sit. You get 185 hp (136 kW) and 238 Nm from 2384 cc, 4 Inline cylinders, 4 valves per cylinder, No boost, Automatic 6, FWD. You give up 78 hp and 60 Nm versus 3.0 AT. You keep earlier peaks (6700 / 4900 vs 6900 / 5600). Specific torque is essentially a match (~99.8 vs ~99.4 Nm/L). Specific power is lower (~77.6 vs ~87.8 hp/L). Compression 10.4 and 88 × 98 are documented only here. Fuel 95, tank 70 L — same as the six.

Choose 3.0 AT if the arithmetic that matters is peak output. You get 263 hp (193 kW) and 298 Nm from 2997 cc, 6 V-shaped cylinders, same Automatic 6, FWD, Gasoline, No boost, Front, transverse, Distributed injection (multi-point). Versus 2.4 AT that is +42.2% power and +25.2% torque for +25.7% capacity. You do not get a measured quicker 0–100, a measured higher top speed, or a measured mpg change — those are not measured. You also do not get AWD, a different gearbox, a different tank, or a different suspension label.

There is no third version and no later generation in this data. If the file had a restyle-only generation it would be folded into 1 generation; it does not. Price is not in the data, so “extra money” here means extra cc, extra cylinders, extra hp, and extra Nm — not a sticker delta.

Short rule from the numbers only: same years, same Sedan, same FWD Automatic 6, same 70 L, same unmeasured performance and weight. 2.4 AT = 185 hp / 238 Nm / 4 Inline / 2384 cc. 3.0 AT = 263 hp / 298 Nm / 6 V-shaped / 2997 cc. Pick the four if 185 hp and the documented 10.4 / 88 × 98 four-cylinder are enough; pick the six if 78 hp and 60 Nm more, at higher peak rpm, is the point of the purchase.