The Family 1 is a straight-4 piston engine that was developed by GM-Opel Powertrain, a subsidiary of Adam Opel A.G. to replace low-displacement versions of GM Family II engine for use on subcompact cars from Opel/Vauxhall.

Ecotec

First generation, features DOHC valvetrain driven by toothed belt and a cast-iron cylinder block with aluminum cylinder head.

• 1.4 L (1389 cc) (phased out): 10.5:1(9.3:1[latin america]) compression, 90 (60 );hp (66 kW) and 92 (52 );ft·lbf (125 N m) of torque.
• 1.6 L (1598 cc): 79 mm (3.11  in) bore, 81.5 mm (3.21 in) stroke, 10.5:1 compression, 100 hp (74 kW) and 111 ft·lbf (150 N m) of torque. .
• 1.8 L (1796 cc): 80.5 mm (3.17  in) bore, 88.2 mm (3.47 in) stroke, 10.5:1 compression, 115 hp (85 kW), 122 hp (90 kW) or 125 hp (92 kW) and 123 ft·lbf (167 N m) of torque. Later versions features variable intake technology.

Family 1 Ecotec engines are used in:

• 1996-2003 Opel Tigra
• 1999-2005 Opel Zafira
• 2002 Opel Corsa
• Opel Astra
• Opel Vectra
• 2003 Saab 9-3
• 2004 Chevrolet Viva
• 2005 Opel Zafira
• 2007 Chevrolet Niva

TwinPort

Updated version introduced in 2002, with lighter cast-iron cylinder block and camshaft driven by toothed belt. Features EGR valve and TwinPort variable intake geometry - twin intake ports with a choke closing one of the ports at low RPM, providing strong air swirl pattern for higher torque levels and better fuel economy. The drive belt for the camshafts is wider and stronger than before, and water pump is not driven by it anymore which improves reliability. Turbocharged versions exist.

• 1.6 L (1598 cc): TwinPort, 79 mm (3.11  in) bore, 81.5 mm (3.21 in) stroke, 10.5:1 compression, 105 hp (77 kW) and 111 ft·lbf (150 N m) of torque.

Ecotec TwinPort Family 1 engine is used in:

• Opel Tigra
• Opel Astra
• Opel Zafira
• Opel Meriva
• Opel Corsa OPC

DCVCP

A new variant of 1.8L Family 1 engine, featuring Euro IV compliancy, DCVCP (Double Continuous Variable Cam Phasing technology, a variant of VVT) and integrated catalytic converter, will enter production Spring 2005. It is based on the lighter cast-iron block, although there's no TwinPort in this version.

• 1.8 L (1796 cc): DCVCP, 80.5 mm (3.17  in) bore, 88.2 mm (3.47 in) stroke, 10.5:1 compression, 140 hp (103 kW) and 129 ft·lbf (175 Nm) of torque.

Ecotec DCVCP engines are used in:

• 2005 Opel Zafira
• Opel Astra

D-TEC

D-TEC was an older variant of Family 1 SOHC engine licensed by Daewoo Motors for their range of Opel-derived cars such as Daewoo Espero and Daewoo Nexia. These engines are built exclusively at Bupyeong engine plant. They feature valvetrain driven by toothed belt, in a DOHC configuration for most versions, and aluminum cylinder head.

• 1.3 L SOHC - Daewoo Lanos
• 1.5 L SOHC - Daewoo Lanos, Daewoo Nexia
• 1.6 L SOHC - Daewoo Nexia
• 1.6 L DOHC - Daewoo Nexia, Daewoo Espero, Daewoo Lanos

E-TEC II

Updated version of D-TEC. Most models feature Euro III-compliancy, and 1.4 L and 1.6 L (1598cc) DOHC versions employ variable intake geometry.

• 1.4 L SOHC - European Chevrolet Kalos/Chevrolet Aveo
• 1.5 L (1498cc) SOHC, Euro II - Asian, Middle Eastern and South African versions Chevrolet Lacetti, Chevrolet Nubira and Chevrolet Aveo, CKD kits of Aveo assembled by ZAZ
• 1.4 L (1498cc) DOHC - European Chevrolet Kalos/Chevrolet Aveo, Chevrolet Lacetti and Chevrolet Nubira
• 1.6 L (1598cc) DOHC- L91/LXT, and of torque, U.S. version of Chevrolet Aveo; European Chevrolet Lacetti and Chevrolet Nubira

Higher-displacement versions of D-TEC and E-TEC II are indeed Family II engines built by Holden.

GM do Brasil

GM do Brasil specializes on SOHC, petrol-powered and FlexPower (powered with ethanol and/or petrol, mixed in any percentage) engines.

• X10YEH - 1.0 L SOHC FlexPower - Chevrolet Celta and Corsa
• X14YEH - 1.4 L SOHC FlexPower - Chevrolet Prisma and Corsa
• X18XE - 1.8 L SOHC FlexPower - Chevrolet Corsa, Chevrolet Montana, and Chevrolet Meriva; Fiat Palio, Fiat Siena, Fiat Palio Weekend, Fiat Strada, Fiat Idea, and Fiat Stilo

GM Brasil also made 16-valve versions of the 1.0, 1.6 and 1.8-liter engines.

The 1.0 L 16v was available in the Corsa line-up from 1999 to 2001. The 1.6 L 16v was available in the Corsa GSi hatchback and the Chevrolet Corsa sedán and station wagon GLS trim. Finally, the 122-hp 1.8 16v was available in the Chevrolet Meriva and Fiat Stilo.

See also

• GM Family II engine
• GM Family 0 engine
• List of GM engines