Kia K4 vs Mazda3 Sedan

Key differences

  • Mazda3 Sedan is 48 mm (1.9 in) shorter than Kia K4 and has 39 L less cargo space.Mazda3 Sedan is 48 mm (1.9 in) shorter than Kia K4 and has 39 L (1.4 cu ft) less cargo space.
  • Mazda3 Sedan makes 29 kW (39 hp) more power than Kia K4.
  • Kia K4 costs US$2,360 less than Mazda3 Sedan (list prices, excl. tax).
Gas

Kia K4

Sedan · 2026 · ICE

US$22,290 excl. tax

CA$24,295 excl. tax

No price listed for United Kingdom yet.

No price listed for Australia yet.

No price listed for Germany yet.

No price listed for Netherlands yet.

No price listed for Norway yet.

No price listed for France yet.

No price listed for Spain yet.

No price listed for Italy yet.

No price listed for Belgium yet.

No price listed for Austria yet.

No price listed for Ireland yet.

No price listed for Sweden yet.

No price listed for Denmark yet.

No price listed for Switzerland yet.

Full specifications of Kia K4
Gas

Mazda3 Sedan

Sedan · 2026 · ICE

US$24,650 excl. tax

No price listed for Canada yet.

No price listed for United Kingdom yet.

No price listed for Australia yet.

No price listed for Germany yet.

No price listed for Netherlands yet.

No price listed for Norway yet.

No price listed for France yet.

No price listed for Spain yet.

No price listed for Italy yet.

No price listed for Belgium yet.

No price listed for Austria yet.

No price listed for Ireland yet.

No price listed for Sweden yet.

No price listed for Denmark yet.

No price listed for Switzerland yet.

Full specifications of Mazda3 Sedan

Size comparison

Side view size comparison of Kia K4 and Mazda3 Sedan
  • Mazda3 Sedan is 48 mm (1.9 in) shorter than Kia K4.
  • Mazda3 Sedan is 25 mm (1 in) taller than Kia K4.
  • Mazda3 Sedan has a wheelbase 5 mm (0.2 in) longer than Kia K4.
Blue solid line: Kia K4; orange dashed line: Mazda3 Sedan. The outlines are generic body shapes drawn at one scale, not the real design of any model.

Kia K4 is 4,709 mm (185.4 in) long and 1,420 mm (55.9 in) high, with a wheelbase of 2,720 mm (107.1 in). Mazda3 Sedan is 4,661 mm (183.5 in) long and 1,445 mm (56.9 in) high, with a wheelbase of 2,725 mm (107.3 in).

Front view size comparison of Kia K4 and Mazda3 Sedan
  • Mazda3 Sedan is 53 mm (2.1 in) narrower than Kia K4.
Blue solid line: Kia K4; orange dashed line: Mazda3 Sedan.

Kia K4 is 1,849 mm (72.8 in) wide and 1,420 mm (55.9 in) high. Mazda3 Sedan is 1,796 mm (70.7 in) wide and 1,445 mm (56.9 in) high.

Rear view size comparison of Kia K4 and Mazda3 Sedan
Blue solid line: Kia K4; orange dashed line: Mazda3 Sedan.

Kia K4 is 1,849 mm (72.8 in) wide and 1,420 mm (55.9 in) high. Mazda3 Sedan is 1,796 mm (70.7 in) wide and 1,445 mm (56.9 in) high.

Compare specifications

A check mark shows the better value in a row. Range and efficiency check marks compare only values from the same test cycle. Prices are each market's own list prices, compared within that market; some include tax and some do not, and no price is marked better when the tax treatment differs. Energy cost is what the energy for 100 km (100 mi where the market uses miles) costs at the market's latest published national energy price, in its own currency, with the price's source and date.

Specification comparison
Specification Kia K4 Mazda3 Sedan
Price
Base priceUnited States US$22,290Better value on this metricexcl. taxChecked . Source for United States, Kia K4US$24,650excl. taxChecked . Source for United States, Mazda3 Sedan
Base priceCanada CA$24,295excl. taxChecked . Source for Canada, Kia K4 Not listed
Base priceUnited Kingdom Neither car has a price listed for United Kingdom yet.
Base priceAustralia Neither car has a price listed for Australia yet.
Base priceGermany Neither car has a price listed for Germany yet.
Base priceNetherlands Neither car has a price listed for Netherlands yet.
Base priceNorway Neither car has a price listed for Norway yet.
Base priceFrance Neither car has a price listed for France yet.
Base priceSpain Neither car has a price listed for Spain yet.
Base priceItaly Neither car has a price listed for Italy yet.
Base priceBelgium Neither car has a price listed for Belgium yet.
Base priceAustria Neither car has a price listed for Austria yet.
Base priceIreland Neither car has a price listed for Ireland yet.
Base priceSweden Neither car has a price listed for Sweden yet.
Base priceDenmark Neither car has a price listed for Denmark yet.
Base priceSwitzerland Neither car has a price listed for Switzerland yet.
Energy cost
Energy cost per 100 miUnited States US$12.93per 100 mi Gasoline at US$4.284 per US gallon, incl. tax, for 19 Oct 2026. EPA consumption. EIA Weekly Retail Gasoline and Diesel Prices for United States gasoline price Better value on this metric US$14.21per 100 mi Gasoline at US$4.284 per US gallon, incl. tax, for 19 Oct 2026. EPA consumption. EIA Weekly Retail Gasoline and Diesel Prices for United States gasoline price
Energy cost per 100 kmCanada CA$12.34per 100 km Petrol at CA$1.738 per litre, incl. tax, for 1 Aug 2026 to 31 Aug 2026. EPA consumption. Statistics Canada, table 18-10-0001-01 for Canada petrol price Better value on this metric CA$13.56per 100 km Petrol at CA$1.738 per litre, incl. tax, for 1 Aug 2026 to 31 Aug 2026. EPA consumption. Statistics Canada, table 18-10-0001-01 for Canada petrol price
Energy cost per 100 miUnited Kingdom £20.03per 100 mi Petrol at £1.753 per litre, incl. tax, for 12 Oct 2026. EPA consumption. UK DESNZ weekly road fuel prices for United Kingdom petrol price Better value on this metric £22.00per 100 mi Petrol at £1.753 per litre, incl. tax, for 12 Oct 2026. EPA consumption. UK DESNZ weekly road fuel prices for United Kingdom petrol price
Energy cost per 100 kmAustralia A$17.08per 100 km Petrol at A$2.405 per litre, incl. tax, for 5 Oct 2026 to 11 Oct 2026. EPA consumption. Australian Institute of Petroleum weekly reports for Australia petrol price Better value on this metric A$18.76per 100 km Petrol at A$2.405 per litre, incl. tax, for 5 Oct 2026 to 11 Oct 2026. EPA consumption. Australian Institute of Petroleum weekly reports for Australia petrol price
Energy cost per 100 kmGermany €15.47per 100 km Petrol at €2.179 per litre, incl. tax, for 19 Oct 2026. EPA consumption. EU Weekly Oil Bulletin for Germany petrol price Better value on this metric €17.00per 100 km Petrol at €2.179 per litre, incl. tax, for 19 Oct 2026. EPA consumption. EU Weekly Oil Bulletin for Germany petrol price
Energy cost per 100 kmNetherlands €16.97per 100 km Petrol at €2.391 per litre, incl. tax, for 19 Oct 2026. EPA consumption. EU Weekly Oil Bulletin for Netherlands petrol price Better value on this metric €18.65per 100 km Petrol at €2.391 per litre, incl. tax, for 19 Oct 2026. EPA consumption. EU Weekly Oil Bulletin for Netherlands petrol price
Energy cost per 100 kmNorway NOK 137.88per 100 km Petrol at NOK 19.42 per litre, incl. tax, for 1 Aug 2026 to 31 Aug 2026. EPA consumption. Statistics Norway fuel prices (table 09654) for Norway petrol price Better value on this metric NOK 151.48per 100 km Petrol at NOK 19.42 per litre, incl. tax, for 1 Aug 2026 to 31 Aug 2026. EPA consumption. Statistics Norway fuel prices (table 09654) for Norway petrol price
Energy cost per 100 kmFrance €15.83per 100 km Petrol at €2.229 per litre, incl. tax, for 19 Oct 2026. EPA consumption. EU Weekly Oil Bulletin for France petrol price Better value on this metric €17.39per 100 km Petrol at €2.229 per litre, incl. tax, for 19 Oct 2026. EPA consumption. EU Weekly Oil Bulletin for France petrol price
Energy cost per 100 kmSpain €12.64per 100 km Petrol at €1.78 per litre, incl. tax, for 19 Oct 2026. EPA consumption. EU Weekly Oil Bulletin for Spain petrol price Better value on this metric €13.89per 100 km Petrol at €1.78 per litre, incl. tax, for 19 Oct 2026. EPA consumption. EU Weekly Oil Bulletin for Spain petrol price
Energy cost per 100 kmItaly €14.31per 100 km Petrol at €2.016 per litre, incl. tax, for 19 Oct 2026. EPA consumption. EU Weekly Oil Bulletin for Italy petrol price Better value on this metric €15.72per 100 km Petrol at €2.016 per litre, incl. tax, for 19 Oct 2026. EPA consumption. EU Weekly Oil Bulletin for Italy petrol price
Energy cost per 100 kmBelgium €14.12per 100 km Petrol at €1.989 per litre, incl. tax, for 19 Oct 2026. EPA consumption. EU Weekly Oil Bulletin for Belgium petrol price Better value on this metric €15.51per 100 km Petrol at €1.989 per litre, incl. tax, for 19 Oct 2026. EPA consumption. EU Weekly Oil Bulletin for Belgium petrol price
Energy cost per 100 kmAustria €12.90per 100 km Petrol at €1.817 per litre, incl. tax, for 19 Oct 2026. EPA consumption. EU Weekly Oil Bulletin for Austria petrol price Better value on this metric €14.17per 100 km Petrol at €1.817 per litre, incl. tax, for 19 Oct 2026. EPA consumption. EU Weekly Oil Bulletin for Austria petrol price
Energy cost per 100 kmIreland €13.99per 100 km Petrol at €1.971 per litre, incl. tax, for 19 Oct 2026. EPA consumption. EU Weekly Oil Bulletin for Ireland petrol price Better value on this metric €15.37per 100 km Petrol at €1.971 per litre, incl. tax, for 19 Oct 2026. EPA consumption. EU Weekly Oil Bulletin for Ireland petrol price
Energy cost per 100 kmSweden SEK 127.02per 100 km Petrol at SEK 17.89 per litre, incl. tax, for 26 Oct 2026. EPA consumption. Preem AB list prices for business customers (Företagskort) for Sweden petrol price Better value on this metric SEK 139.54per 100 km Petrol at SEK 17.89 per litre, incl. tax, for 26 Oct 2026. EPA consumption. Preem AB list prices for business customers (Företagskort) for Sweden petrol price
Energy cost per 100 kmDenmark DKK 127.23per 100 km Petrol at DKK 17.92 per litre, incl. tax, for 1 May 2026 to 31 May 2026. EPA consumption. Energistyrelsen Prisdatabase (monthly energy prices, Blyfri 95 and Autodiesel) for Denmark petrol price Better value on this metric DKK 139.78per 100 km Petrol at DKK 17.92 per litre, incl. tax, for 1 May 2026 to 31 May 2026. EPA consumption. Energistyrelsen Prisdatabase (monthly energy prices, Blyfri 95 and Autodiesel) for Denmark petrol price
Energy cost per 100 kmSwitzerland CHF 14.34per 100 km Petrol at CHF 2.02 per litre, incl. tax, for 1 Sep 2026 to 30 Sep 2026. EPA consumption. BFS LIK Durchschnittspreise für Energie und Treibstoffe (monthly) for Switzerland petrol price Better value on this metric CHF 15.76per 100 km Petrol at CHF 2.02 per litre, incl. tax, for 1 Sep 2026 to 30 Sep 2026. EPA consumption. BFS LIK Durchschnittspreise für Energie und Treibstoffe (monthly) for Switzerland petrol price
Dimensions
Length 4,709 mm (185.4 in)4,661 mm (183.5 in)
Width 1,849 mm (72.8 in)1,796 mm (70.7 in)
Height 1,420 mm (55.9 in)1,445 mm (56.9 in)
Wheelbase 2,720 mm (107.1 in)2,725 mm (107.3 in)
Curb weight 1,330 kg1,330 kg (2,932 lb)1,411 kg1,411 kg (3,111 lb)
Performance
Power 110 kW (147 hp)139 kW (186 hp)Better value on this metric
Torque 179 Nm132 lb-ft (179 Nm)252 Nm186 lb-ft (252 Nm)Better value on this metric
Engine and fuel
Fuel use 33.1 mpg7.1 L/100 km (EPA)39.8 mpg (EPA)Better value on this metric30.2 mpg7.8 L/100 km (EPA)36.2 mpg (EPA)
Fuel tank 46.9 L Not available
Engine size 2,000 cc2,488 cc
Practicality
Seats 55
Cargo space 413 L413 L (14.6 cu ft)Better value on this metric374 L374 L (13.2 cu ft)

Kia K4

Specifications: US manufacturers official sites, checked .

Source detailskiamedia.com/us/en/models/k4/2026/specifications; kia.com/us/en/k4/specs-compare; fueleconomy.gov/feg/Find.do?action=sbs&id=50058. Read: length=185.4in, width=72.8in, height=55.9in, wheelbase=107.1in, curb_weight=2932lb, seats=5, power=147hp, epa_combined_mpg=33mpg, torque=132lb-ft, cargo=14.6cu ft, fuel_tank=12.4gal, engine_displacement=2.0L. Factors: 25.4 mm/in, 0.45359237 kg/lb, 0.7457 kW/hp, 235.215/mpg, 1.609344 km/mi.

Mazda3 Sedan

Specifications: Manufacturer official pages, cited per row, checked . www.mazdausa.com

Source detailsEPA check: fueleconomy.gov 2026 combined 30 mpg, page 30. Exact factors: cu ft x 28.316846592; hp x 0.745699872; in x 25.4; l/100km = 235.214583 / mpg; lb-ft x 1.3558179483314004.

Other specifications: Manufacturer official pages, cited per row, checked . www.mazdausa.com

Source detailsFills an empty field only.

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