Everybody likes a bargain - but is it possible to significantly reduce your shopping bill?

A survey released this week suggested you could save up to £15 on a week's worth of groceries by shopping at a discount store instead of one of the big four.

But do the numbers really stack up? Journalists at WalesOnline put it to the test.

They put a shopping list together, set a budget of £50 and went to Asda and Aldi.

They chose Asda's own brand products, compared like-for-like with Aldi products and tried to match weights and quality.

They picked basic items a family of four with a toddler might buy, such as bread, milk, teabags, cornflakes and nappies.

There were a total of 40 items.

The Aldi basket
The Aldi basket

The shopping list

BREAD

Asda: Baker's Selection square cut medium white 800g - 50p

Aldi: 42p

MILK

Asda: 6pt semi-skimmed - £1.45

Aldi: £1.35

EGGS

Asda: Smartprice 15 pk- £1.19

Aldi: £1.09

KIDS' YOGHURT

Asda: Smartprice 5x 55g fromage frais 42p

Aldi: 12 for 84p (12.7 per 100g)

MINCE

Asda: Butcher's Selection 500g lean beef mince - £3.49

Aldi: £3.09

PIZZA

Asda: Own brand cheese and tomato, 257g £1.10

Aldi: 288g - 99p

MARGARINE

Asda: Own brand olive spread, 500g - 85p

Aldi: 79p

POTATOES

Asda: 2.5k Grower's Selection white potatoes - £1.25

Aldi: £1.19

HAM

Asda: Own brand thick dry cured ham (6 slices) 150g - £1.90

Aldi: 120g - £1.09 (90.8 per 100g)

CHEESE

Aldi cheese
Aldi cheese

Asda: Smartprice mild cheddar 385g - £1.75

Aldi: £1.49

BAKED BEANS

Asda: Chosen by You 4 x 410g - 98p

Aldi: 4 x 420g - 99p

TINNED TOMATOES

Asda: Chosen By You plum tomatoes, 400g - 35p

Aldi: 34p (Premium)

CORNFLAKES

Aldi cornflakes
Aldi cornflakes

Asda: Own brand Honey Nut Cornflakes, 500g - £1

Aldi: 500g - 85p

WHEAT CEREAL

Asda: Own brand wheat bisks, 24 - £1.29

Aldi: 69p

CHICKEN

Asda: Butcher's Selection chicken (2.1kg) £5.23

Aldi: (1.90k-2.25kg) - £4.15

FISH

Asda: Fishmonger's Selection crisp crumb cod fillets x 4 - £3.80

Aldi: Chunky cod fillets x 4 (500g) - £2.29

SQUASH

Asda: Own brand no added sugar Fruit and Barley orange - 69p

Aldi: 75p

PORK CHOPS

Asda: Butcher's Selection pork loin steaks, 500g - £2.49

Aldi: 480g - £2.29

CHOCOLATE DIGESTIVES

Aldi chocolate digestives
Aldi chocolate digestives

Asda: Own brand milk chocolate digestives, 300g - 60p

Aldi: 44p

TUB OF VANILLA ICE CREAM

Asda: Own brand really creamy vanilla, 900ml - £2

Aldi: £1.49

TEABAGS

Asda: Chosen By You, 160 - £1.67

Aldi: Red Label, 160 - £1.55

FAMILY PACK OF CRISPS

Asda: Own brand ready salted x 6 - 85p

Aldi: x 6 - 69p

BOTTLE OF WINE

Asda: Busby Estate Chardonnay, 75cl - £3.98

Aldi: Grapevine Chardonnay - £3.29

TINNED PEAS

Asda: Own brand garden peas, 550g - 55p

Aldi: 300g - 21p (11.4p per 100g)

BAR OF CHOCOLATE

Asda: Own brand fruit and nut, 200g - £1.20

Aldi: 85p

BANANAS

Asda: Chosen By Kids, 8 pk - £1.20

Aldi: 7 pk - funsize - 99p

ONIONS

Asda: Grower's Selection brown onions, 1kg - 67p

Aldi: 55p

CARROTS

Asda: Grower's Selection, 1kg - 45p

Aldi: 43p

SPAGHETTI

Asda spaghetti
Asda spaghetti

Asda: Own brand spaghetti, 500 g - 55p

Aldi: 20p

MUSHROOMS

Asda: Grower's Selection, 400g - £1

Aldi: 380g - 79p

Asda's basket
Asda's basket

TOMATOES

Asda: Cherry tomatoes, 365g - 99p

Aldi: 360g - 65p

CUCUMBER

Asda: 50p

Aldi: 43p

FROZEN CHIPS

Asda: Own brand straight cut oven chips, 2kg - £2

Aldi: 1.5kg - 75p (50p per kg)

FAMILY SHAMPOO

Aldi shampoo
Aldi shampoo

Asda: Own brand anti-dandruff shampoo, 300ml - £1

Aldi: 59p

WASHING POWDER

Asda: Own brand tropical gel detergent, 840ml (30 washes) - £3

Aldi: 740 ml (21 washes) - £1.75 (£2.36 a litre)

WASHING UP LIQUID

Asda: Own brand lemon, 500 ml - 50p

Aldi: 49p

SOAP

Asda: Own brand cream bar, 4 x 125g - £1.20

Aldi: 79p

NAPPIES

Asda nappies
Asda nappies

Asda: Little Angels Comfort Dry, size 5, 40pk - £3.75

Aldi: £3.39

TOILET ROLL

Asda: Shades quilted, 9 roll - £3.25

Aldi: £2.99

SHOWER GEL

Shower gel
Shower gel

Asda: Own brand Get Zingy showerburst, 250ml - 39p

Aldi: 65p

TOTAL COST :

ASDA = £61.03

ALDI = £48.65

The verdict!

Aldi comes out in first place with a saving of £12.38 - even without choosing some of the even cheaper items at the discount store.