Daihatsu Sirion, 2007
The new Daihatsu Sirion is a totally differently proportioned car to its predecessor and more closely matches the Nissan Micra for length, width and height but with passenger space rivalling the considerably longer Honda Jazz.
For example its front and rear tracks - at 1,460 and 1,465 mm - are 65 and 60 mm wider than before. The Sirion's length of 3,600 mm is actually 95 mm shorter and even 20 mm less than the Ford Ka.
However, the wheelbase of 2,430 mm is 85 mm longer than the old model and the 1,665 mm width is 70 mm more and even 5 mm greater than the Toyota Yaris, Nissan Micra and Fiat Punto. Height grows by 100 mm to 1,550 mm - 10 mm greater than the Micra.
Especially short front and rear overhangs, a higher seating position and a gently tapering roofline provide surprising space yet cleverly mask the height.
The car looks especially wide and squat - helped by the strong swage lines over the wheelarches flowing into a protruding rear bumper. The overall effect is of a confident, well-balanced design exuding quality and solidity.
An especially impressive drag coefficient of 0.31 Cd confirms the new Daihatsu Sirion's efficiency and aids fuel economy and top speed while reducing wind noise.
As Yoshihiro Fujibayashi, Studio Leader, Styling Division, Daihatsu Motor Co, Ltd said: "We tried to give the car sculpture-like dimensions and a sense of quality. Look at the handsome, chiselled face around the headlamps, the animated and dynamic side view and the rear combination lamps integrated into the bodylines.
Impressive Interior Space
The new Daihatsu Sirion has occupant legroom and headroom from the next-size-up. Its interior width of 1,400 mm is 70 mm greater than before and 10 mm more than the Toyota Yaris.
A 590 mm seat height allows easy entry and exit aided by wide-opening doors. The rear doors, for example, open to 80 degrees.
The interior length of 1,830 mm is 20 mm more than the Yaris while the interior height is also greater than the Toyota.
Luggage space is also impressive. With both rear seats up it measures 225 litres (VDA) compared to 205 litres for the Yaris. However, with the seats folded, this rises to 630 litres - 80 litres more than the Toyota.
Mr Fujibayashi continues: "As for the interior, we tried to make this as simple as possible. The speedometer is on the steering column. We designed this after the image of a clock placed on a coffee table in a living room.
World-Class Engines
The new Daihatsu Sirion boasts two of the world's most efficient 1.0 and 1.3 litre petrol engines, combining strong driveability with ultra-low fuel consumption and exhaust emissions.
Both offer punchy throttle response at town speeds, reducing the need for constant gear-changes, yet are especially sweet-spinning on the motorway, allowing the keener owner to exploit their eagerness to rev during brisker driving. Both are also Euro4-compliant.
All-New One Litre
The three cylinder, twin-overhead camshaft 1.0 litre is all-new and is bigger than before with a 998 cc capacity (was 989 cc), and a slightly smaller 71 mm bore and longer 84 mm stroke (was 72 x 81 mm).
This gives greater low-speed torque or pulling power, while the Dynamic Variable Valve Timing (DVVT) allows a wider spread of high-end power and low-speed flexibility.
The new 12-valve 1.0 litre's maximum power of 69.3 PS at 6,000 rpm is exceptionally high for its size, while the 69.3 lb.ft torque is also impressive - especially at an accessible 3,600 rpm. The compression ratio is 10.5:1.
Featuring compact combustion chambers and an offset crankshaft, this engine employs resin-coated pistons and low-tension piston rings for reduced internal friction.
Both head, block and even oil-pan are made from lightweight but rigid aluminium, contributing to low vibration and quietness.
Unrivalled Performance, Economy And Emissions
No rival can match the new Daihatsu Sirion 1.0 litre's performance, fuel economy and low emissions.
The top speed is a remarkable 99.4 mph with a 0-60 mph time of 13.5 seconds. Fuel consumption is an outstanding 46.3/64.2 and 56.5 mpg on the Urban/Extra Urban and Combined Cycles.
An exceptionally low CO2 emissions of 118 g/km means the car qualifies for a Road Fund Licence charge of only £75 for 12 months plus £38 first registration fee (AA band up to 120 g/km). This places it in a category largely dominated by hybrids - and the smaller Daihatsu Charade, of course.
Thoroughly Revised 1.3 Litre
The new Sirion's four-cylinder 1.3 litre engine has been thoroughly revised to provide stronger low-speed torque and a more useable power delivery in day-to-day driving.
Still featuring Dynamic Variable Valve Timing (DVVT) and twin overhead camshafts, this basic engine is also supplied to Toyota by Daihatsu for use in its Yaris supermini.
