Opel Signum fuel consumption

Of all Opel Signum modifications produced from 2003 to 2008 real fuel consumption according to user ratings is approximately 4% higher compared to advertised consumption. For petrol engines real consumption is in average 5% higher, but for diesel engines is approximately 3% higher. Since 2003 the Opel Signum average difference between owner-reported real-world fuel consumption and declared fuel economy has been less than industry average.

Year-to-year deviations of actual owner-reported average fuel consumption from advertised values

Year	Gasoline cars		Diesel cars
Year	All carmakers	Opel Signum	All carmakers	Opel Signum
2003	+6%	+3%	+8%	insignificant
Show all years
2004	+7%	+3%	+9%	+4%
2005	+8%	+7%	+10%	+5%
2006	+9%	+9%	+11%	+7%
2007	+11%	+9%	+12%	+5%
2008	+12%	+10%	+13%	+5%

See below for the actual consumption of generations and versions of Opel Signum.

2005 - 2008

Opel Signum 2005 fuel economy

Average advertised fuel consumption for petrol engines	25.1 MPG 9.4 l/100km
Average real-world fuel consumption for petrol engines	24.4 MPG 9.7 l/100km
Average real gasoline consumption difference *	+7%
Average advertised fuel consumption for diesel engines	36.6 MPG 6.4 l/100km
Average real-world fuel consumption for diesel engines	34.8 MPG 6.8 l/100km
Average real diesel consumption difference *	+4%

Opel Signum 2005 specs Opel Signum 2005 owner reviews Opel Signum service info and schedule

According to advertised fuel consumption, a Opel Signum 2005 with automatic transmission consumes on average 0.5 liters per 100 km or 7% more fuel than similar versions with manual gearbox. Based on user-reported real-world fuel consumption, this generation Opel Signum with automatic transmission consumes around 0.8 litres per 100 km or 10% more fuel than a version with the same engine but a manual gearbox.

The best real fuel economy in its class according to user reviews of all the modifications has modification with 1.9 diesel engine and manual transmission (Opel Signum 2007 1.9 CDTi 150 HP). However, of all modifications the best advertised fuel economy in its class has Opel Signum with 3.0 diesel engine and manual transmission (Opel Signum 2005 3.0-V6 CDTI 184 HP).

The table below shows the real and claimed fuel consumption and the differences for specific versions.

Modification	Claimed consumption	Real consumption
1.8 liter petrol engine
Opel Signum 2005 1.8i 16V 140 HP manual	30.5 MPG 7.7 l/100km	27.0 MPG 8.7 l/100km+13%
1.9 liter diesel engine
Opel Signum 2005 1.9 CDTi 100 HP manual	39.9 MPG 5.9 l/100km
Opel Signum 2005 1.9 CDTi 120 HP manual	39.9 MPG 5.9 l/100km	37.3 MPG 6.3 l/100km+7%
Opel Signum 2007 1.9 CDTi 120 HP manual	39.9 MPG 5.9 l/100km	39.9 MPG 5.9 l/100km0%
Opel Signum 2005 1.9 CDTi 150 HP manual	39.2 MPG 6.0 l/100km	36.8 MPG 6.4 l/100km+7%
Opel Signum 2005 1.9 CDTi 150 HP automatic	33.6 MPG 7.0 l/100km	34.1 MPG 6.9 l/100km-1%
Opel Signum 2007 1.9 CDTi 150 HP manual	39.2 MPG 6.0 l/100km	37.9 MPG 6.2 l/100km+3%
Opel Signum 2007 1.9 CDTi 150 HP automatic	33.6 MPG 7.0 l/100km	31.8 MPG 7.4 l/100km+6%
2.0 liter petrol engine
Opel Signum 2005 2.0-16V Turbo 175 HP manual	26.4 MPG 8.9 l/100km	25.3 MPG 9.3 l/100km+4%
Opel Signum 2007 2.0-16V Turbo 175 HP manual	26.4 MPG 8.9 l/100km
2.2 liter petrol engine
Opel Signum 2005 2.2-16V DGi 155 HP automatic	28.3 MPG 8.3 l/100km	23.3 MPG 10.1 l/100km+22%
Opel Signum 2005 2.2-16V DGi 155 HP manual	29.0 MPG 8.1 l/100km	27.0 MPG 8.7 l/100km+7%
Opel Signum 2007 2.2-16V DGi 155 HP automatic	28.3 MPG 8.3 l/100km
2.8 liter petrol engine
Opel Signum 2005 2.8-V6 Turbo 230 HP manual	22.2 MPG 10.6 l/100km	21.4 MPG 11.0 l/100km+4%
Opel Signum 2005 2.8-V6 Turbo 230 HP automatic	21.0 MPG 11.2 l/100km	21.2 MPG 11.1 l/100km-1%
Opel Signum 2007 2.8-V6 Turbo 250 HP manual	22.2 MPG 10.6 l/100km
Opel Signum 2007 2.8-V6 Turbo 250 HP automatic	21.0 MPG 11.2 l/100km
3.0 liter diesel engine
Opel Signum 2005 3.0-V6 CDTI 184 HP manual	33.6 MPG 7.0 l/100km	31.8 MPG 7.4 l/100km+6%
Opel Signum 2006 3.0-V6 CDTI 184 HP automatic	32.7 MPG 7.2 l/100km	28.7 MPG 8.2 l/100km+14%

Do you own a Opel Signum? Please share your fuel economy!

2003 - 2005

Opel Signum 2003 fuel economy

Average advertised fuel consumption for petrol engines	25.6 MPG 9.2 l/100km
Average real-world fuel consumption for petrol engines	24.7 MPG 9.5 l/100km
Average real gasoline consumption difference *	+3%
Average advertised fuel consumption for diesel engines	34.6 MPG 6.8 l/100km
Average real-world fuel consumption for diesel engines	33.5 MPG 7.0 l/100km
Average real diesel consumption difference *	insignificant

Opel Signum 2003 specs Opel Signum 2003 owner reviews Opel Signum service info and schedule

According to advertised fuel consumption, a Opel Signum 2003 with automatic transmission consumes on average 0.9 liters per 100 km or 13% more fuel than similar versions with manual gearbox. Based on user-reported real-world fuel consumption, this generation Opel Signum with automatic transmission consumes around 0.8 litres per 100 km or 10% more fuel than a version with the same engine but a manual gearbox.

The best real fuel economy in its class according to user reviews of all the modifications has modification with 1.8 petrol engine and manual transmission (Opel Signum 2003 1.8-16V 125 HP). However, of all modifications the best advertised fuel economy in its class has Opel Signum with 2.2 petrol engine and manual transmission (Opel Signum 2003 2.2-16V DGi 155 HP).

The table below shows the real and claimed fuel consumption and the differences for specific versions.

Modification	Claimed consumption	Real consumption
1.8 liter petrol engine
Opel Signum 2003 1.8-16V 125 HP manual	29.8 MPG 7.9 l/100km	28.0 MPG 8.4 l/100km+6%
1.9 liter diesel engine
Opel Signum 2004 1.9 CDTi 120 HP manual	39.2 MPG 6.0 l/100km	36.2 MPG 6.5 l/100km+8%
Opel Signum 2004 1.9 CDTi 150 HP manual	38.6 MPG 6.1 l/100km	35.6 MPG 6.6 l/100km+8%
Opel Signum 2004 1.9 CDTi 150 HP automatic	32.7 MPG 7.2 l/100km	31.4 MPG 7.5 l/100km+4%
2.0 liter petrol engine
Opel Signum 2003 2.0-16V Turbo 175 HP manual	25.6 MPG 9.2 l/100km	25.0 MPG 9.4 l/100km+2%
2.0 liter diesel engine
Opel Signum 2003 2.0 DTI ECOTEC 101 HP manual	39.9 MPG 5.9 l/100km
2.2 liter petrol engine
Opel Signum 2003 2.2-16V DGi 155 HP manual	29.0 MPG 8.1 l/100km	26.4 MPG 8.9 l/100km+10%
Opel Signum 2003 2.2-16V DGi 155 HP automatic	25.8 MPG 9.1 l/100km	25.3 MPG 9.3 l/100km+2%
2.2 liter diesel engine
Opel Signum 2003 2.2 DTi-16V 125 HP manual	37.3 MPG 6.3 l/100km	37.3 MPG 6.3 l/100km0%
Opel Signum 2003 2.2 DTi-16V 125 HP automatic	30.9 MPG 7.6 l/100km	30.2 MPG 7.8 l/100km+3%
3.0 liter diesel engine
Opel Signum 2003 3.0-V6 CDTI 177 HP manual	31.8 MPG 7.4 l/100km	29.8 MPG 7.9 l/100km+7%
Opel Signum 2003 3.0-V6 CDTI 177 HP automatic	29.8 MPG 7.9 l/100km	29.8 MPG 7.9 l/100km0%
3.2 liter petrol engine
Opel Signum 2003 3.2-V6 Cosmo 211 HP manual	23.3 MPG 10.1 l/100km	22.6 MPG 10.4 l/100km+3%
Opel Signum 2003 3.2-V6 Cosmo 211 HP automatic	22.0 MPG 10.7 l/100km	20.5 MPG 11.5 l/100km+7%

Do you own a Opel Signum? Please share your fuel economy!

* - Difference between advertised and user reported fuel economy has been calculated taking into account only those car versions for which information is available both on the fuel consumption specified by the manufacturer and reported by users.

User-reported fuel consumption may not accurately represent all users' experiences due to variables such as driving conditions, driving style, technical condition of the vehicle, and other circumstances. Thus, it should not be relied upon as a representative indicator.